Hot water tank law: Massachusetts Journeyman Plumber (UPC) Practice Questions

Under Chapter 142, what is the most a hot water tank's working pressure may be, compared with the test pressure marked on it?

Section 18(E) of chapter 142 bars installing a hot water tank at a maximum working pressure greater than 50% of the test pressure marked on the tank.

A hot water tank will store water at more than 15 psi. What minimum test pressure must be stamped on it?

Section 18(D) of chapter 142 requires a stamped test pressure of not less than 200 psi for a tank in which water is heated or stored at more than 15 psi.

Where may the T&P relief valve discharge pipe from a hot water tank end under Chapter 142?

Section 19(B) of chapter 142 requires the discharge to run in non-ferrous pipe or tubing at least 3/8 in. inside diameter, with no shut-off, to an open plumbing fixture or to within 12 in. of the basement floor.

Under Chapter 142, what may be installed between a hot water tank and its pressure relief valve?

Section 19(A) of chapter 142 requires the pressure relief valve to be installed with no shut-off valve between it and the tank, and 19(C) requires all pipe and fittings between relief valves and the tank to be non-ferrous.

The domestic hot water part of a tankless water heater must have a tempering device. At what most may it deliver water?

Section 19 of chapter 142 requires that portion of a tankless water heater to have a pressure relief valve and an automatic tempering device set to deliver water not exceeding 180°F.