Water Filtration Systems

water filtration systems — pre-owned

1,673listings

Browse 1,673 water filtration systems — pre-owned on eBay — listings updated every few minutes. All items are pre-owned and sold by eBay sellers directly.

Waterdrop G2P600 Reverse Osmosis System, 600 GPD, 7 Stage Tankless Water Filter
-21%
Certified - RefurbishedBuy It NowBest Offer

Waterdrop G2P600 Reverse Osmosis System, 600 GPD, 7 Stage Tankless Water Filter

The G2P600 reverse osmosis system provides instant filtration and hydration without the wait. The G2P600 RO water filter features a tankless design, saving 70% of under-sink space. This is ideal for modern kitchens.

$236.00$299.00-21%

You save $63.00

Free ShippingOntario, US
waterdropdirect
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99.5%Excellent· 30.7k
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600GPD MIZUDO 8-Stage Tankless Reverse Osmosis Water Under Sink Filter Quiet
UsedBuy It NowBest Offer

600GPD MIZUDO 8-Stage Tankless Reverse Osmosis Water Under Sink Filter Quiet

ModelPureflo 600GPD. 3:1 RO Filtration System Under Sink, Leak-Free, Quiet, Reduce PFAS&Fluoride. 【Smart Life Indicator 】No more guessing about when to change! just push, pull, and twist in 3 seconds, all without moving the unit.

$199.99
Free ShippingElkhart, US
fogatti_rv_appliances_store
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99.2%Excellent· 584
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KANGEN LeveLuk SD501 Water Ionizer Machine with LCD Display
UsedBuy It NowBest Offer

KANGEN LeveLuk SD501 Water Ionizer Machine with LCD Display

Does need new hose as seen in photos. Local pickup is not only OK it is encouraged.

$650.00
+$19.00Canby, US
97013mike
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100.0%Excellent· 983
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Culligan 01018684 Gold Series Water Softener Circuit Control Board
TOP
UsedBuy It NowBest Offer

Culligan 01018684 Gold Series Water Softener Circuit Control Board

This part was removed and inspected by HVAC installer from a fully functioning system. Old system was replaced with newer one (more energy efficient) and was in good working condition. This part was in good working condition when removed. Please check images carefully because you will receive exactly the part as pictured, or a very similar one. Purchasing used parts you agree with the statement that sometimes hidden defects or malfunctions may occur during installation or continuous use. There is no warranty on used parts.If you don’t have skills or knowledge, you must ask certified HVAC technician to install. I am not liable for any damages or failures as a result of improper installation.

$225.00
Free ShippingRochester, US
otis7272TOP
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100.0%Excellent· 500
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Waterdrop G2 Reverse Osmosis System, 7 Stage Tankless RO Water Filter System
-13%
Certified - RefurbishedBuy It NowBest Offer

Waterdrop G2 Reverse Osmosis System, 7 Stage Tankless RO Water Filter System

Compared to the ordinary RO system, the Waterdrop RO system always has a stable water flow. This tankless RO has a low drain ratio of 1:1 and saves water waste by 300%. 𝐈𝐧𝐧𝐨𝐯𝐚𝐭𝐢𝐯𝐞 𝐭𝐚𝐧𝐤𝐥𝐞𝐬𝐬 𝐝𝐞𝐬𝐢𝐠𝐧: The tankless design ensures the safety of your family’s drinking water.

$199.00$229.00-13%

You save $30.00

Free ShippingCranbury, US
waterdropdirect
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99.5%Excellent· 30.7k
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Waterdrop G3P800 Reverse Osmosis System, NSF/ANSI 42 & 53 & 58 & 372 Certified
-7%
Certified - RefurbishedBuy It NowBest Offer

Waterdrop G3P800 Reverse Osmosis System, NSF/ANSI 42 & 53 & 58 & 372 Certified

Also certified to NSF/ANSI 372 for lead-free materials. Two holes required: one for the RO faucet and one for the drain pipe connection. ✅Certified Filtration Standards. ✨Sleek Tankless Design.

$649.00$699.00-7%

You save $50.00

Free ShippingCranbury, US
waterdropdirect
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99.5%Excellent· 30.7k
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Culligan Mark 89 Estate 2 Mechanical Clock 600B120 Timer Timing Device Assembly
UsedBuy It Now

Culligan Mark 89 Estate 2 Mechanical Clock 600B120 Timer Timing Device Assembly

Culligan 600B120 Mark 89 / Estate 2 Mechanical Clock Timer Timing Device Assembly. Tested and guaranteed working timer. Very nice timing device in exceptional condition. This timer is easily among the nicest we have ever offered. See detailed images of actual timing device you will receive in this listing.

$239.95
+$10.95Marshfield, US
softening-solutions
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99.8%Excellent· 3.0k
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Waterboss 54550 Water Softener Controller Circuit Board 50 Series
UsedBuy It Now

Waterboss 54550 Water Softener Controller Circuit Board 50 Series

Waterboss 54550 Water Softener Controller Circuit Board 50 Series. Guaranteed working and in excellent overall condition. See images of actual controller you will receive in this listing.

$159.95
+$8.95Marshfield, US
softening-solutions
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99.8%Excellent· 3.0k
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John Ellis Living Water Machine LWM- 5 Machine
UsedBuy It Now

John Ellis Living Water Machine LWM- 5 Machine

Very clean with just a little corrosion(see pictures). Come with everything shown. It does heat up and the fan works. Electrical cords in good condition. No UV lights. Paper work provided may not be for this model but may be helpful.

$1000.00
See listingVancouver, US
cheerfultortoise
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100.0%Excellent· 5.5k
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Kinetico Water Softener K30 Control Valve K60 K100 Metered Head
For parts or not workingBuy It Now

Kinetico Water Softener K30 Control Valve K60 K100 Metered Head

As seen in pictures. Was removed from my personal K30 system at my house. Obviously had some leaks at some point, but since I owned it, it has never leaked. Would regen as it should, manual regen works too.

$199.99
Free ShippingMohnton, US
610autoparts
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98.4%Excellent· 283
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Waterboss 19043 Water Softener Drive Motor 12VAC 60Hz 4/3 RPM CW 3W
UsedBuy It Now

Waterboss 19043 Water Softener Drive Motor 12VAC 60Hz 4/3 RPM CW 3W

$59.95
+$5.95Marshfield, US
softening-solutions
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99.8%Excellent· 3.0k
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Delta DWQ1001012 Clarifi Under Sink 6-Stage Reverse Osmosis Filter System *
UsedBuy It Now

Delta DWQ1001012 Clarifi Under Sink 6-Stage Reverse Osmosis Filter System *

Delta DWQ1001012 Features ® Reverse Osmosis Beverage Faucet, available in a variety of styles and finishes, or can be plumbed to fridge water dispenser. FILTERED WATER MADE EASY: Pairs with a Delta.

$399.00
+$40.00Wittensville, US
homefixturesandmore
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99.3%Excellent· 2.7k
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GE Replacement Wall Mount Bracket  for GXWH20S GXWH20F GXWH20T
TOP
UsedBuy It NowBest Offer

GE Replacement Wall Mount Bracket for GXWH20S GXWH20F GXWH20T

free shipping you get what is in the picture

$12.34$12.99-5%

You save $0.65

Free ShippingOwensboro, US
davesdiscount1970TOP
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99.8%Excellent· 13.7k
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Whirlpool water softener WHES30
UsedBuy It NowBest Offer

Whirlpool water softener WHES30

Like New, Slightly used -The Whirlpool water softener WHES30 is a whole house system designed to provide soft water throughout your home. Made of durable plastic in a beige color, this model is compatible with the GE GXSHC40N 15" Smart Water Softener. With a capacity of 40,000 grains, this water filtration system is perfect for improving the taste and quality of your tap water, making it ideal for household use. Upgrade your plumbing fixtures with this slightly used Whirlpool water softener for a healthier and more convenient water supply.

$250.00
See listingJacksonville, US
albotanicalsworld
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100.0%Excellent· 456
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Rettin MMP-7070T Water Ionizer White 2-Stage ACF Ceramic Filter Household
UsedBuy It NowBest Offer

Rettin MMP-7070T Water Ionizer White 2-Stage ACF Ceramic Filter Household

Rettin MMP-7070T Water Ionizer White 2-Stage ACF Ceramic Filter Household

$200.00
See listingDayton, US
bra_538472
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100.0%Excellent· 9
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Water Softener Control Head Unit With Bypass Valve For Parts Or Use
For parts or not workingBuy It NowBest Offer

Water Softener Control Head Unit With Bypass Valve For Parts Or Use

I don’t have the power cord for it but was a good working unit until it was updated

$200.00
See listingGilmanton Iron Works, US
bo158349
Feedback
97.4%Good· 312
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Used Kinetico Older Style Bypass. Great Working Condition.
UsedBuy It Now

Used Kinetico Older Style Bypass. Great Working Condition.

This is a older Style water softener bypass. It came out of a model 60 water softener. It works as it should. comes with retaining clip to attach to softener along with pin and bottom clip. Currently has cpvc as the connecting tubes and removed pipes from in/outs. all o-rings, seals and cips are in tact. See pictures. also comes with 1/4" port tee. selling as is. No returns

$60.00
See listingColumbus, US
abestseller24
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99.5%Excellent· 498
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Culligan Mark 100 Soft Minder Water Softener Parts Control Valve Body Housing
UsedBuy It Now

Culligan Mark 100 Soft Minder Water Softener Parts Control Valve Body Housing

Culligan Mark 100 Soft Minder Water Softener Parts Valve Head Housing. Guaranteed solid replacement housing. No cracks or defects. Thoroughly cleaned and inspected. See images of actual part you will receive in this listing.

$89.95
+$8.95Marshfield, US
softening-solutions
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99.8%Excellent· 3.0k
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OEM Kinetico Pawl Kit Models Mach & "K" Series 30/50/60/100 Complete Set
UsedBuy It Now

OEM Kinetico Pawl Kit Models Mach & "K" Series 30/50/60/100 Complete Set

Genuine OEM Kinetico Pawl Kit Models 30/50/60/100 Complete Set. See images of actual pawls you will receive. They are all in excellent condition and come with springs as shown. Free shipping.

$59.95
Free ShippingMarshfield, US
softening-solutions
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99.8%Excellent· 3.0k
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Waterdrop G2P600 Reverse Osmosis System, 600 GPD RO Extra 1 WD-G2CF Filter
-18%
Certified - RefurbishedBuy It NowBest Offer

Waterdrop G2P600 Reverse Osmosis System, 600 GPD RO Extra 1 WD-G2CF Filter

The G2P600 reverse osmosis system provides instant filtration and hydration without the wait. The G2P600 RO water filter features a tankless design, saving 70% of under-sink space. This is ideal for modern kitchens.

$261.00$319.00-18%

You save $58.00

Free ShippingMonroe Township, US
waterdropdirect
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99.5%Excellent· 30.7k
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Water Quality RO-132 Reverse Osmosis Under Sink Filter 4 gal Used
UsedBuy It NowBest Offer

Water Quality RO-132 Reverse Osmosis Under Sink Filter 4 gal Used

Water Quality RO-132 Reverse Osmosis Under Sink Filter 4 gal Used

$149.99
See listingSan Antonio, US
jorei-2175
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Fully Reconditioned Autotrol 255 Water Softener Metered Control Valve
UsedBuy It NowBest Offer

Fully Reconditioned Autotrol 255 Water Softener Metered Control Valve

O rings, nuts and bolts to use to bolt on either an Autotrol bypass valve or an Autotrol back-plate. 13/16" or 1" distributor pilot. Valve cover.

$230.00
+$20.00Villa Park, US
jcwaterinc
Feedback
100.0%Excellent· 536
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Clack Water Softener (V3003-05)-C-Series WS1 Flow Meter Turbine Assembly
UsedBuy It Now

Clack Water Softener (V3003-05)-C-Series WS1 Flow Meter Turbine Assembly

Clack Water Softener (V3003-05)-C-Series WS1 Flow Meter Turbine Assembly. Guaranteed working in excellent condition. See images of actual meter you will receive in this listing.

$59.95
+$5.95Marshfield, US
softening-solutions
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99.8%Excellent· 3.0k
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Rain Soft EC4 19748 Water Softener Controller Panel Control Circuit Board
UsedBuy It Now

Rain Soft EC4 19748 Water Softener Controller Panel Control Circuit Board

Rain Soft EC4 19748 / 19512 Water Softener Conditioner Controller Panel Control Circuit Board. Nice used board in very good condition. Guaranteed working. See detailed images of actual controller you will receive in this listing. It will be essential to closely evaluate the board as well as the part number to ensure it is a suitable replacement.

$189.95
+$8.95Marshfield, US
softening-solutions
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99.8%Excellent· 3.0k
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Kinetico Level 1 Cap Cover complete
UsedBuy It NowBest Offer

Kinetico Level 1 Cap Cover complete

(Kinetico Level 1 Cap Cover complete W/ Cap, o-rings, 8) mounting screws Regeneration Screws and spring.

$139.95
+$5.95Allendale, US
jjlrrw
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100.0%Excellent· 872
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Edenpure SR-1000 Scalerid Hard Water Treatment System New Read
UsedBuy It Now

Edenpure SR-1000 Scalerid Hard Water Treatment System New Read

Preowned but unused

$14.90
+$10.80Novelty, US
nicefinds_llc
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100.0%Excellent· 5.3k
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Kinetico Regeneration Actuator  screw fits Mach and k series heads NEW
UsedBuy It Now

Kinetico Regeneration Actuator screw fits Mach and k series heads NEW

You're buying 1 NEW Kinetico Actuator regeneration screw with new seal.

$52.00
See listingCedar Lake, US
goodoldgiirl
Feedback
100.0%Excellent· 538
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Rain Soft EC5 51927 Water Softener Controller Panel Control Circuit Board
UsedBuy It Now

Rain Soft EC5 51927 Water Softener Controller Panel Control Circuit Board

$319.95
+$8.95Marshfield, US
softening-solutions
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99.8%Excellent· 3.0k
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Kinetico K5 Reverse Osmosis Drinking Station
UsedBuy It NowBest Offer

Kinetico K5 Reverse Osmosis Drinking Station

Refurbished Kinetico K5 Reverse Osmosis Drinking Station Comes with Pre Carbon Filter and Post Carbon Filter

$200.00
See listingNew Milford, US
johnd118
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100.0%Excellent· 1
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Portable RV Water Softener - On The Go - Single
UsedBuy It NowBest Offer

Portable RV Water Softener - On The Go - Single

$70.00
See listingColorado Springs, US
m*c*f*
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100.0%Excellent· 282
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Ecodyne  Water Softener Control Board Model#GS6125D     TESTED
UsedBuy It NowBest Offer

Ecodyne Water Softener Control Board Model#GS6125D TESTED

This part was removed and inspected by HVAC installer from a fully functioning system. Old system was replaced with newer one (more energy efficient) and was in good working condition. This part was in good working condition when removed. Please check images carefully because you will receive exactly the part as pictured, or a very similar one. Purchasing used parts you agree with the statement that sometimes hidden defects or malfunctions may occur during installation or continuous use. There is no warranty on used parts.If you don’t have skills or knowledge, you must ask certified HVAC technician to install. I am not liable for any damages or failures as a result of improper installation.

$125.00
Free ShippingRochester, US
otis7272
Feedback
100.0%Excellent· 500
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Culligan Gold Water Softener Circuit Board Tested and Working
UsedBuy It NowBest Offer

Culligan Gold Water Softener Circuit Board Tested and Working

PRICE IS FOR ONE BOARD. HAVE 2 FOR SALE. The Culligan Gold Water Softener Circuit Board is a tested and working component specifically designed for the Culligan Gold model water filtration system. This plastic circuit board, in the color of gold, comes as a single piece in the pack. It is compatible with the Culligan Gold model, ensuring a proper fit and function for your water softening needs. This product is an essential part of maintaining your home's water filtration system, providing reliable performance and filtration capabilities.

$150.00
See listingSandy, US
pierce-products
Feedback
100.0%Excellent· 190
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GE Appliance 7346431A, 15204C B1 DV, Control Board with Display, Water Softener
UsedBuy It NowBest Offer

GE Appliance 7346431A, 15204C B1 DV, Control Board with Display, Water Softener

GE Appliance 7346431A, 15204C B1 DV, Control Board with Display, Water Softener. Power plug-in is not included

$165.00
+$7.95Enterprise, US
xqpx121
Feedback
98.9%Excellent· 90
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Culligan Gold Series Water Softener Parts 24V Drive Motor Assembly. 01004833
UsedBuy It NowBest Offer

Culligan Gold Series Water Softener Parts 24V Drive Motor Assembly. 01004833

clean motor, what you see is what you get see my feedback

$165.00
+$12.00Brownsburg, US
dls6763
Feedback
100.0%Excellent· 1.3k
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Culligan 01031620 HE 1.5 Down-flow High Efficiency Softener Gear Box Assembly
UsedBuy It Now

Culligan 01031620 HE 1.5 Down-flow High Efficiency Softener Gear Box Assembly

Culligan 01031620 HE High Efficiency Water Softener Parts Gear Box Assembly (Four bolt style not five bolt) 1.25 / 1.5 Down-flow. Excellent condition.

$189.95
+$9.95Marshfield, US
softening-solutions
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99.8%Excellent· 3.0k
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U.S. Water Matrixx Flexx Traxx Drop Bypass Valve Assembly Water Softener Parts
UsedBuy It Now

U.S. Water Matrixx Flexx Traxx Drop Bypass Valve Assembly Water Softener Parts

U.S. Water Matrixx, Flexx, Traxx, and Drop Bypass Valve Assembly Water Softener Parts. Fits Powerline Pro Kinetico and Spring Well softeners and Iron filters. Used but in very good condition.

$69.95
+$8.95Marshfield, US
softening-solutions
Feedback
99.8%Excellent· 3.0k
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Culligan 01016452 Circuit Control Board Medallist Water Softener Parts
UsedBuy It Now

Culligan 01016452 Circuit Control Board Medallist Water Softener Parts

Culligan 01016452 Circuit Control Board Medallist Softener. Guaranteed working control. See images of actual board you will receive in this listing. Please make sure that it is identical to the one you are replacing to ensure fitment.

$159.95
+$8.95Marshfield, US
softening-solutions
Feedback
99.8%Excellent· 3.0k
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Kinetico Mach Style Bypass Control Valve Water Softener Parts
TOP
UsedBuy It Now

Kinetico Mach Style Bypass Control Valve Water Softener Parts

• I try to matchCURRENT cheaper price(I don’t match past prices). Location: 19T 1025 SOM 5202.

$62.25$75.00-17%

You save $12.75

Free ShippingBogart, US
topparts8TOP
Feedback
99.6%Excellent· 32.4k
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North Star Water Softener Circuit Board Model# NSC40ED TESTED
TOP
UsedBuy It NowBest Offer

North Star Water Softener Circuit Board Model# NSC40ED TESTED

This part was removed and inspected by HVAC installer from a fully functioning system. Old system was replaced with newer one (more energy efficient) and was in good working condition. This part was in good working condition when removed. Please check images carefully because you will receive exactly the part as pictured, or a very similar one. Purchasing used parts you agree with the statement that sometimes hidden defects or malfunctions may occur during installation or continuous use. There is no warranty on used parts.If you don’t have skills or knowledge, you must ask certified HVAC technician to install. I am not liable for any damages or failures as a result of improper installation.

$135.00
Free ShippingRochester, US
otis7272TOP
Feedback
100.0%Excellent· 500
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Culligan 01012834 Silver Series Water Softener Parts Circuit Cont
TOP
UsedBuy It NowBest Offer

Culligan 01012834 Silver Series Water Softener Parts Circuit Cont

This part was removed and inspected by HVAC installer from a fully functioning system. Old system was replaced with newer one (more energy efficient) and was in good working condition. This part was in good working condition when removed. Please check images carefully because you will receive exactly the part as pictured, or a very similar one. Purchasing used parts you agree with the statement that sometimes hidden defects or malfunctions may occur during installation or continuous use. There is no warranty on used parts.If you don’t have skills or knowledge, you must ask certified HVAC technician to install. I am not liable for any damages or failures as a result of improper installation.

$120.00
Free ShippingRochester, US
otis7272TOP
Feedback
100.0%Excellent· 500
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