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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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Model diagram and schematic

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ALL PARTS
Showing 10 of 45 parts  |
Lock Washer 174C46
#8

Replacement parts diagram

Lock washer

Part #174C46

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

Union Seal 35C103
#22C

Replacement parts diagram

Union seal

Part #35C103

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

Disc Holder 50C47
#15B

Replacement parts diagram

Disc holder

Part #50C47

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

Strain Plug 18Y2
#19A

Replacement parts diagram

Strain plug

Part #18Y2

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

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

Service Kit 5A

#NI

All parts diagram

Service kit

Part #5A

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

Diagram 135A20
#10A

Replacement parts diagram

Diagram

Part #135A20

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

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