Show or Hide

Water Safety & Flow Control


777SI, S777SI

Bronze, Wye-Pattern Strainers with Tapped Retainer Cap


Replacement Product: LF777SI, LFS777SI


3/8 to 3 in. (10 to 80mm)


Series 777SI, S777SI Bronze Wye-Pattern Strainers feature a wye-pattern, bronze body stainless steel screen and solid tapped retainer cap with NBR gasket. Model 777SI comes with threaded connections and is available in sizes 3/8 to 3 in. (10 to 80mm). Model S777SI comes with solder connections and is available in sizes 1/2 to 2 in. (15 to 50mm). Model 777SI - Maximum Pressure (non shock): 400psi (27.6 bar) @ 210°F (99°C) WOG, 125psi (8.6 bar) @ 353°F (178.3°C) WSP. Model S777SI - Maximum Pressure (non shock): 400psi (27.6 bar) @ 150°F (66°C) 103 kPa (below 50 psi/3.5 bar) @ 250°F (121°C) WSP.

Loading Models/UPC Codes...

There are currently no BIM drawings available for this product.

Approval information is not available on this item, please contact your local Watts Representative for this information.
Loading warranty information...

Disclaimer: Watts product dimensions 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 without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

Please Note: Watts literature requires Adobe Acrobat Reader to view.

Additional Information

Danger – Scalding Lurks!

Every year, thousands of people suffer serious thermal shock or scalding injuries in their bathtubs, sinks and showers.

Click here for informative resources to help you protect against these dangers.

Learn About

Thermostatic Mixing Valves

Every year thousands suffer injuries as a result of hot water scalding and thermal shock injuries. Thermostatic mixing valves protect against these dangers.

To learn more about thermostatic mixing valves and how they work, click here.