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The DANCO 80413 is a Nu-Seal diaphragm rubber faucet washer designed to restore proper shutoff and reduce dripping in faucets that use a diaphragm-style cartridge seat. Unlike traditional flat washers, the diaphragm design seals across the full seat surface, which improves shutoff reliability and extends service intervals between rebuilds. The 80413 weighs 0.034 pounds and is sold as a single-pack unit, making it a straightforward stock item for plumbers carrying common faucet repair components. Installation requires no specialty tooling and fits within a standard faucet service call.
This diaphragm washer is intended for use in American Standard faucets that accept a Nu-Seal style diaphragm replacement. It is most commonly installed during routine faucet maintenance, drip repair, or cartridge seat reconditioning on residential sink faucets. Plumbers and experienced DIYers performing faucet rebuilds will find this a direct drop-in service part when the original diaphragm has worn, cracked, or lost its seating profile.
Designed as a Nu-Seal diaphragm replacement for American Standard faucets requiring this style of washer.
Shut off the water supply at the fixture stop valves before disassembling the faucet. A licensed plumber or qualified tradesperson should confirm the existing diaphragm seat condition before installing the new washer, as a damaged seat will reduce the service life of the replacement part. Basic hand tools are sufficient for most faucet disassembly. Follow all applicable local plumbing codes, including IPC guidelines, when performing faucet service work.
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