The Watts LF777M1-100 1 1/4 is a 1-1/4" lead-free wye-pattern strainer with NPT connections that removes pipeline debris and particulates to protect downstream equipment. It ships with a 100 mesh 304 stainless steel screen. It features a copper body and a epdm seat. Rated to 400 psi. This model is certified lead-free for potable-water installations.
This 1 1/4 inch lead free wye pattern strainer is designed to protect system components from dirt, rust, and other damaging debris in the piping system. It has a solid retainer cap with gasket, threaded end connections, and a 100 mesh stainless steel screen. The maximum working pressure is 400 psi (27.6 bar) WOG at 210 degree F (99 degrees C) and 125 psi (8.6 bar) WSP at 353 degree F (178 degrees C).
Features
- Lead free construction
- Wye pattern
- Threaded end connections
- Solid retainer cap with gasket
- Includes: Strainer
Common Questions
- What mesh or screen size does it come with?
- LF777M1-100 1 1/4 ships with a 100 mesh 304 Stainless Steel screen (100 openings per linear inch). The screen is called out by the number in the model code.
- Can I get a finer or coarser screen?
- Yes. Watts builds this body with a range of screens and encodes the choice in the model number, so a finer or coarser screen is a different part number rather than an accessory. This one is 100 mesh. Finer screens catch smaller particles but clog faster and cost more pressure drop, so size the screen to the debris you actually have.
- Can I use this on steam?
- Yes. LF777M1-100 1 1/4 is rated 125 psi WSP on steam, which is a separate and much lower limit than its 400 psi WOG (cold water, oil, gas) rating. Do not size steam service off the WOG number.
- Does it have a blowoff / blowdown port?
- No. This model has a solid retainer cap, so cleaning means removing the cap and lifting out the screen. If you want to blow the strainer down in place, order the tapped-cap version of this body instead.
- What is the "seat material" on a strainer?
- A strainer has no seat -- nothing closes against anything. The EPDM called out here is the retainer-cap seal (the gasket between the cap and the body), which is what limits the temperature and chemical compatibility of the closure.
Specifications
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Type: Strainer
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Size: 1-1/4"
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Connection: NPT
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Body Material: Copper
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Cap Seal / Gasket Material: EPDM
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Max Pressure (WOG, psi): 400
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Application: Domestic Water
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Pack Quantity: 6
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Country of Origin: China
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Warranty: 1 Year Limited
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MPN: LF777M1-100 1 1/4
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Certifications: NSF-372
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Lead-Free: Yes
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Strainer Pattern: Wye
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Screen Type: Mesh
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Screen Mesh: 100
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Screen Material: 304 Stainless Steel
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Blowoff / Drain Tapping: No
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Blowoff Plug Included: No
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Max Steam Pressure (WSP, psi): 125
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Body Coating: None
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Alternate Screens Available: Yes
