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Is it typical for an average gas hot water heater, a gas range and a gas dryer to use appx 1 therm per day with a typical family?

Is it written that a 30PSI residential hot water boiler pressure relief valve must be mounted upright, or is horizontal OK? I've read that the weight of the lever plays a role in the tension on the spring, and am confuzzled as to certifications. I've got one that's professionally installed...

Was looking through the manual for our recently installed, and still uninspected, hot water heating system Everything in it, the illustrations for installing the boiler and the written directions, indicate the pressure relief valve should be mounted upright. The manual reads: "3. Orient the...

Have a really old house. It's plumbed with copper, 1/2" throughout. I don't see a tad of anything larger. The pressure is OK if one thing is open. Two things and it drops. Three, well, that's not good. I think the house is getting good pressure from the street - my unscientific...

Hot water boiler pressure is at 18 cold, 25 or so when hot. The new regulating valve is adjusted to the lowest possible setting. Expansion tank has 15PSI. The two zone baseboard loop is on a first floor. I don't know if this important, but the feed is into the return line and the pumps...

Had a plumbing project done professionally and they used Chinese "M" brand fittings on the gas line. The pipe was made in the good 'ol USA. Any problem with using imported fittings - are they as good as the USA made Ward brand etc since they carry similar approvals?