Product Overview

Pressure – Temperature
Maximum Working Pressure:
1
/2" – 3" (15-75mm)
400psi (27.6 bar) WOG @ 210ºF (99ºC)
125psi (8.6 bar) WSP @ 353ºF (178ºF)
4" (100mm)
300psi (20.7 bar) WOG @ 210ºF (99ºC)
125psi (8.6 bar) WSP @ 353ºF (178ºF)
For Liquid and Steam Service
ES-777S
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Approval
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S777S
777S
Series 777S, S777S
Wye-Pattern Bronze Strainers
Sizes:
1
/2" – 4" (15-100mm)
Series 777S, S777S Wye-Pattern Bronze Strainers are
designed to protect system components from dirt, rust and
other damaging debris in the piping system. This series fea-
tures a retainer cap tapped for closure plug.
Features
• Bronze body
• Wye-pattern
• Retainer cap tapped for closure plug
Models
777S –
1
/2" – 4" (15 – 100mm) threaded connections
S777S –
1
/2" – 2” (15 – 50mm) solder connections
Specifications
A wye-pattern bronze strainer to be installed as indicated on
the plans. The strainer must have retainer cap tapped for clo-
sure plug. Strainer shall be rated to 400psi (27.6 bar) WOG @
210ºF (99ºC); 125psi (8.6 bar) WSP @ 353ºF (178ºF) for sizes
1
/2" – 3" (15 – 75mm) and 300psi (20.7 bar) WOG @ 210ºF
(99ºC); 125psi (8.6 bar) @ 353ºF (178ºC) for size 4” (100mm).
Strainer shall be a Watts Regulator Company Series 777S
(threaded ends) or S777S (solder ends).
Materials
Body: Bronze
Retainer Cap:
1
/2" (15mm): Brass
3
/4" – 4" (20-100): Bronze
Cap Gasket:
1
/2" – 2" (15-50mm): EPDM
Other sizes consult factory
Standard Screen:
1
/2" – 2
1
/2" (15-65mm): 304 stainless
steel #20 mesh,
3" (75mm):
3
/64" (1.2mm) 304 stainless
steel perforated screen
4" (100mm):
1
/8" (3mm) 304 stainless
steel perforated screen
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with-
out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
BAA/ARRA Compliant
*
*This product complies with the Buy American Act and The
American Recovery and Reinvestment Act. For more information,
visit watts.com.