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Model # 1789 Official Watts 3/4" water pressure reducing valve
Here are the diagrams and repair parts for Official Watts 1789 3/4" water pressure reducing valve, as well as links to manuals and error code tables, if available.
Error CodesBy Schematic
SELECT DIAGRAM
Browse Parts for
1789 3/4" Water Pressure Reducing Valve
#10B
Replacement parts diagram
Diagram
Part #135B20
The manufacturer no longer makes this part, and there's no substitute part
#20B
Replacement parts diagram
Strainer
Part #4500A77
The manufacturer no longer makes this part, and there's no substitute part
#13
Replacement parts diagram
Disc washer
Part #25B60
The manufacturer no longer makes this part, and there's no substitute part
#4
Replacement parts diagram
Washer
Part #45A62
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
#11B
Replacement parts diagram
Stem & seal
Part #SA-50C27
The manufacturer no longer makes this part, and there's no substitute part
#3B
Replacement parts diagram
Spring cage
Part #135B3-M3
The manufacturer no longer makes this part, and there's no substitute part
#15B
Replacement parts diagram
Disc holder
Part #50C47
The manufacturer no longer makes this part, and there's no substitute part
#18A
Replacement parts diagram
Gasket
Part #215Y102
The manufacturer no longer makes this part, and there's no substitute part
#16B
Replacement parts diagram
Gasket
Part #1-1/8X1-3/8
The manufacturer no longer makes this part, and there's no substitute part
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Main causes: power supply failure, blown thermal fuse, bad relay control board, damaged terminal block, wiring failure…
Most common repair guides to help fix your ranges
These step-by-step repair guides will help you safely fix what’s broken on your range.
How to replace a range oven door switch
The oven door switch detects whether the oven door is closed and helps control the oven light. Replace the switch if it …
Repair difficulty
Time required
30 minutes or less
How to replace a range oven door lock assembly
Oven door not locking? You can replace the lock assembly in less than 30 minutes. Here's how.…
Repair difficulty
Time required
15 minutes or less
Effective articles & videos to help repair your ranges
Use the advice and tips in these articles and videos to get the most out of your range.
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