User Manual
Models
Valve Assembly
A high capacity valve that can be tank wall-mounted. Inlet side
has 2 a machined flange 1"– 2" are also female NPT pipe
threaded for inlet connection. All sizes have a male straight-pipe
threaded for locknut. (See replacement parts for locknuts).
Maximum Pressure - 165 psi • Maximum Temperature - 180°F
Pipe Stem Dimensions Inner Master Weight
Size Series Fitting A B Pack Pack each (oz.)
3
⁄8" 375
1
⁄4-20 3" 1
1
⁄4" 10 40 8.6
1
⁄2" 500
1
⁄4-20 3
1
⁄2" 2" 10 40 11.3
3
⁄4" 750
1
⁄4-20 4" 2" 10 40 18.3
A high capacity valve that can be tank wall-mounted. Inlet side
has a machined flange and is female NPT pipe threaded for
inlet connection.
1" 1000
5
⁄16-18 3" 4" 5 10 29.0
1" 1000-01
3
⁄8-16 3" 4" 5 10 29.0
1
1
⁄4" 1250
3
⁄8-16 5
1
⁄2" 4" 5 10 50.5
1
1
⁄2" 1500
3
⁄8-16 5
1
⁄2" 4" 5 10 48.0
2" 2000
3
⁄8-16 6" 4" 5 10 53.6
1000-1 same as 1000 except it has
3
⁄8 - 16 threads in short arm.
Valve Assembly with Locknut and Gasket
(For Bulkhead Mount)
A high capacity valve that can be tank wall-mounted. Inlet side
has a machined flange and male straight-pipe threaded for
locknut. (See replacement parts for locknuts).
Pipe Stem Dimensions Inner Master Weight
Size Series Fitting A B Pack Pack each (oz.)
3
⁄8" 375-12
1
⁄4-20 3" 1
1
⁄4" 10 40 9.3
1
⁄2" 500-12
1
⁄4-20 3
1
⁄2" 2" 10 40 12.0
3
⁄4" 750-12
1
⁄4-20 4" 2" 10 40 18.9
Valve Assembly
A high capacity valve with same inlet feature as standard valve,
with MNPT thread on the outlet. Like the standard valves, this
valve can be tank wall-mounted. (See replacement parts for
locknuts.)
Pipe Stem Dimensions Inner Master Weight
Size Series Fitting A B Pack Pack each (oz.)
1
⁄2" 500TO
1
⁄4-20 3
1
⁄2" 2" 10 40 12.0
3
⁄4" 750TO
1
⁄4-20 4" 2" 10 40 17.3
Valve Assembly with Locknut and Gasket
(For Bulkhead Mount)
1
⁄2" 500TO-12
1
⁄4-20 3
1
⁄2" 2" 10 40 13.0
3
⁄4" 750TO-12
1
⁄4-20 4" 2" 10 40 18.6
Flow Specifications
Size Pressure Flow Pressure Flow
3
⁄
8
" 50psi 14 gpm 100psi 21 gpm
1
⁄
2
" 50psi 20 gpm 100psi 31 gpm
3
⁄
4
" 50psi 40 gpm 100psi 60 gpm
1" 50psi 100 gpm 100psi 150 gpm
1
1
⁄
4
" - 2" 50psi 250 gpm 100psi 348 gpm
Threaded Outlet
3
⁄8" -
3
⁄4"
1" - 2"
3
⁄8" -
3
⁄4"
12 Series
A
B
ES-HDV 0844 © Watts Regulator Company, 2008
500
1000
5012
500TO
USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.watts.com
Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanada.ca
Water Safety & Flow Control Products