Helped service again tonight. Just got home at 2:30am.
3” galvanized water main busted a hole putting a 6 floor office building out of commission. We used two Hymax compression couplings & 7’ of a fresh 3 galvanized pipe 14’ aff.
Service manager said he had stainless slide out of a Hymax once & doesn’t approve using it, even though it’s the same OD. He said the stainless is too slick and stout, that the galvanized gives the Hymax something to bite into. Galvanized or brass.
Using it today I noticed only the rubber was against the pipe, not the metal of the coupling.
@Jeff Handy , what you suggested is the best alternative I can find on the internet. Thank you.
@SHEPLMBR , Any building 4+ floors must only have cast iron in any floor penetrations, wall rough & above ceiling. Anything non flammable is permitted. It’s actually fire codes before plumbing. Cast iron porcelain coated floor sinks are used in these cases.
I would use the plastic floor sink for any light commercial buildings. Thank you.