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Model # 1790 Official Watts 1" water pressure reducing valve
Here are the diagrams and repair parts for Official Watts 1790 1" water pressure reducing valve, as well as links to manuals and error code tables, if available.
Error CodesBy Schematic
SELECT DIAGRAM
Browse Parts for
1790 1" Water Pressure Reducing Valve
#23B
Replacement parts diagram
Union tailpc
Part #135B139
The manufacturer no longer makes this part, and there's no substitute part
#20C
Replacement parts diagram
Strainer
Part #135A77
The manufacturer no longer makes this part, and there's no substitute part
#11B
Replacement parts diagram
Stem & seal
Part #SA-50C27
The manufacturer no longer makes this part, and there's no substitute part
#15A
Replacement parts diagram
Disc holder
Part #50B47
The manufacturer no longer makes this part, and there's no substitute part
#12B
Replacement parts diagram
Seat
Part #50C16
The manufacturer no longer makes this part, and there's no substitute part
#21C
Replacement parts diagram
Union nut
Part #35C140
The manufacturer no longer makes this part, and there's no substitute part
#21A
Replacement parts diagram
Union nut
Part #35A140
The manufacturer no longer makes this part, and there's no substitute part
#16A
Replacement parts diagram
Gasket
Part #1-1/2X1-3/4
The manufacturer no longer makes this part, and there's no substitute part
#9A
Replacement parts diagram
Plate
Part #135A66-M2
The manufacturer no longer makes this part, and there's no substitute part
Adjusting screw (3/8-16 x 2")
Part #N/P
The manufacturer no longer makes this part, and there's no substitute part
Most common symptoms to help you fix your refrigerators
Choose a symptom to see related refrigerator repairs.
Main causes: damaged door seal, faulty defrost sensor or bi-metal thermostat, broken defrost heater, bad defrost timer o…
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Main causes: blocked vents, defrost system problems, evaporator fan failure, dirty condenser coils, bad sensors, condens…
Main causes: leaky door gasket, defrost system failure, evaporator fan not running, dirty condenser coils, condenser fan…
Main causes: jammed ice cubes, broken ice maker assembly, dirty water filter, kinked water line, bad water valve, freeze…
Main causes: blocked air vents, compressor problems, condenser or evaporator fan not working, control system failure, se…
Main causes: water valve leaking, frozen or broken defrost drain tube, overflowing drain pan, cracked water system tubin…
Things to do: clean condenser coils, replace the water filter, clean the interior, adjust doors to prevent air leaks, cl…
Most common repair guides to help fix your refrigerators
These step-by-step repair guides will help you safely fix what’s broken on your refrigerator.
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Replace the water valve that feeds water to the ice maker and water dispenser if it no longer controls the flow of water…
Repair difficulty
Time required
15 minutes or less
How to clean refrigerator condenser coils
Help your refrigerator run more efficiently by cleaning the condenser coils. It's easy and takes just a few minutes.…
Repair difficulty
Time required
15 minutes or less
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If the temperature in your refrigerator doesn't match the temperature you set, the problem could be the temperature cont…
Repair difficulty
Time required
30 minutes or less
Effective articles & videos to help repair your refrigerators
Use the advice and tips in these articles and videos to get the most out of your refrigerator.
No matter what style Maytag refrigerator you have, we can walk you through replacing the water filter.…
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If your refrigerator's ice maker isn't producing as much ice as it should, or water is flowing poorly from the dispenser…