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Watts
Plumbing

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.

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  • In the search box below, enter all or part of the part number or the part’s name.

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Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 45 parts  |
Adjusting Screw (3/8-16 X 2") N/P
Adjusting screw (3/8-16 x 2")

Part #N/P

The manufacturer no longer makes this part, and there's no substitute part

Adjustment Nut 30B33
#2

Replacement parts diagram

Adjustment nut

Part #30B33

The manufacturer no longer makes this part, and there's no substitute part

Stem & Seal SA-50B27
#11A

Replacement parts diagram

Stem & seal

Part #SA-50B27

The manufacturer no longer makes this part, and there's no substitute part

Disc Washer 25B60
#13

Replacement parts diagram

Disc washer

Part #25B60

The manufacturer no longer makes this part, and there's no substitute part

Gasket 215Y102
#18A

Replacement parts diagram

Gasket

Part #215Y102

The manufacturer no longer makes this part, and there's no substitute part

Disc 50C37
#14B

Replacement parts diagram

Disc

Part #50C37

The manufacturer no longer makes this part, and there's no substitute part

Diagram 135B20
#10B

Replacement parts diagram

Diagram

Part #135B20

The manufacturer no longer makes this part, and there's no substitute part

Seat 50B16
#12A

Replacement parts diagram

Seat

Part #50B16

The manufacturer no longer makes this part, and there's no substitute part

Spring Cage 135B3-M3
#3B

Replacement parts diagram

Spring cage

Part #135B3-M3

The manufacturer no longer makes this part, and there's no substitute part

Disc 50B37
#14A

Replacement parts diagram

Disc

Part #50B37

The manufacturer no longer makes this part, and there's no substitute part

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