[mardin]

I have one 40 gallon water heater servicing men and women restrooms with:

Men’s restroom:
• 2- tank top water closets
• 1- urinal
• 1-lavatory

Women’s restroom:

• 3-water closets
• 1-lavatory

Pastor’s restroom:

• 1- tank top water closet
• 1- shower
• 1-lavatory

I added a new restroom; for instance do I need another 40 gallon water heater?
The new men and women restroom have the same amount of fixtures.
.

[ballengerb1]

You already have what you need in a 40 gallon tank. Restrooms use very little hot water, none in toilets and urinals and limited at the sink. The shower can easily be supported by one 40 gallon heater.

[speedball1]

Bob's correct! As it stands you have a 40 gallon heater servicing only 5 fixture units.
Even with the new restrooms it only kicks it up to 7 fixture units. You're going to be just fine. Good luck, Tom

[Milo Dolezal]

Just to agree with previous posts: You are just fine with one, 40gln heater.