Watts LFS777SI - Manual

For Liquid and Steam Service
ES-LF777SI
LF777SI
Sizes: 3 ⁄
8
" – 3" (10-75mm)
Series LF777SI, LFS777SI Wye-Pattern, Lead Free* cast strain-
ers are designed to protect plumbing system components from
dirt, rust and other damaging debris. The Series LF777SI and
LFS777SI feature Lead Free* construction to comply with Lead
Free* installation requirements.
Features
• NSF 61 Annex G certified
• Lead Free* cast copper silicon alloy body and cap
• Wye-pattern
• Tapped retainer cap
• Closure plug
• Special flared screen opening on upstream end to provide
unrestricted flow through the strainer
Models
LF777SI – 3 ⁄
8
" – 3" (10 – 80mm) threaded connections
LFS777SI – 1 ⁄
2
" – 2" (15 – 50mm) solder connections †
Specifications
A wye-pattern, Lead Free* cast strainer to be installed as indi-
cated on the plans. The strainer must have a tapped retainer
cap and closure plug. Strainer shall be rated to 400psi (27.6
bar) WOG; 125psi (8.6 bar) WSP for sizes 3 ⁄
8
"-2" (10-50mm) and
300psi (20.7 bar) @ 210ºF (99ºC); 125psi (8.6 bar) WSP @ 353ºF
(178ºC) for sizes 2 1 ⁄
2
"-3" (65-80mm). The strainer shall be con-
structed using Lead Free* cast copper silicon alloy. Lead Free*
strainers shall comply with state codes and standards, where
applicable, requiring reduced lead content. Strainer shall be a
Watts Series LF777SI (threaded ends) or LFS777SI (solder ends).
Materials
Body: Lead Free* cast copper silicon alloy
Retainer Cap: Lead Free* cast copper silicon alloy
Plug Lead Free* brass
Gasket: NBR
Standard Screen: #20 mesh, 304 stainless steel
Pressure – Temperature
Maximum Working Pressure:
3 /
8
"–2" (10-50mm)
400psi (27.6 bar) WOG @ 210ºF (99ºC)
125psi (8.6 bar) WSP @ 353ºF (178ºC)
2 1 /
2
"–3" (65-80mm)
300psi (20.7 bar) WOG @ 210ºF (99ºC)
125psi (8.6 bar) WSP @ 353ºF (178ºC)
* The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.
LEAD FREE
*
Series LF777SI, LFS777SI
Wye-Pattern, Lead Free Cast Strainers
NSF Certified to NSF 61 Annex G
Job Name ––––––––––––––––––––––––––––––––––––––––––– Contractor ––––––––––––––––––––––––––––––––––––––––––––
Job Location ––––––––––––––––––––––––––––––––––––––––– Approval –––––––––––––––––––––––––––––––––––––––––––––
Engineer ––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No. ––––––––––––––––––––––––––––––––––
Approval ––––––––––––––––––––––––––––––––––––––––––––– Representative ––––––––––––––––––––––––––––––––––––––––
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.