New Safety Requirements for Bath Tub Faucets in Minnesota

The newest version of the Minnesota State Plumbing Code, published electronically on November 13, 2012, now requires a safety device to be installed on bath tub faucets to help reduce the potential for serious scalding injury.  Here's the exact text, which comes from section 4715.1240 of the Minnesota State Plumbing Code:

Subp. 4. Hot water temperature control device for tubs. Bathtubs and whirlpool tubs must be provided with water temperature limiting devices set at a maximum water temperature of 120 degrees Fahrenheit to reduce the risk of scalding, according to ASSE Standard 1070.

Watts MMVThis means that the water coming out of a bath tub faucet needs to be tempered so that the hottest water that can come out of the faucet is 120 degrees F.

So how is this done?  I asked Mark Jerde of RightMark Plumbing how he achieves compliance with this new requirement.  He installs thermostatic mixing valves conforming to ASSE 1070 at the supply lines to bath tub faucets.  One such mixing valve is the Watts MMV series, pictured at right.  Just don't look for these types of valves at big box home improvement stores; they don't sell them.  Maybe this will change soon.

For more info on this new standard, click here: ASSE 1070

Author: Reuben Saltzman, Structure Tech Home Inspections


Written By

Reuben is a second-generation home inspector with a passion for his work. He grew up remodeling homes and learning about carpentry since he was old enough to hold a hammer. Reuben grew up thinking he was going to be a school teacher because he enjoyed teaching others so much. In a sense, that’s a lot of what home inspections are about, so Reuben truly does what he loves. Sharlene has worked with Structure Tech since 2000 and Reuben has been contributing to her blog since 2008.

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