Thermostatic Mixing Valves - Page 3 - Plumbing Zone

**ILPlumber** · 08-23-2010, 10:44 PM

Quote:

Originally Posted by Matt

Aww crap! I bring those "childrens play tents" home.

I use these now. Those WH bags are too dangerous.

Protech · 08-23-2010, 11:03 PM

And waste a buttload of gas/electricity/oil

Quote:

Originally Posted by nhmaster3015

code says...... new or replacement water temp must be limited to either 120 or 130 depending on your local amendment. Watts and Sparco both recommend an ASSE 1070 compliant tempering valve with hot temp limiter. Watts further recommends that ASSE 1070 tempering valves be located at fixtures that provide hot water and that the tank tempering valve be set to 160 to kill off legionella bacteria. Though I know of no states that currently are requiring this, I suspect it will not be long before it becomes mandatory. So here's a chance to make some bucks yes

OldSchool · 08-24-2010, 09:22 AM

So if I get this right.

The hot water tank has to install a mixing valve no matter what.

We have HWT rental companies that rent out HWT and never install a mixing valve.

I see them do this everyday. I told them numerous times to put one on the tank but they just argue.

I think I will send out a letter to the provincial ministry informing them what is going on.

Protech · 08-24-2010, 10:09 AM

I have never heard of such a requirement. You almost never see mixing valves except on a few commercial applications.

house plumber · 08-24-2010, 01:29 PM

Quote:

Originally Posted by Protech

I have never heard of such a requirement. You almost never see mixing valves except on a few commercial applications.

I have to type this but here 424.5 bathtub and whrilpool tub valves: the hot water supplied to bathtubs shall be limited to a maximum temperature of 120 by a water temperature limiting device

Pipe Rat · 08-24-2010, 01:55 PM

Quote:

Originally Posted by house plumber

I have to type this but here 424.5 bathtub and whrilpool tub valves: the hot water supplied to bathtubs shall be limited to a maximum temperature of 120 by a water temperature limiting device

Couldn't that requirement be met simply by the hot adjustment limit stop on say a moen positemp valve? Of course if someone cranks the water heater up this temp will rise also.

Tommy plumber · 08-24-2010, 02:27 PM

Quote:

Originally Posted by house plumber

I have to type this but here 424.5 bathtub and whrilpool tub valves: the hot water supplied to bathtubs shall be limited to a maximum temperature of 120 by a water temperature limiting device

Don't forget the bidet. FL plumbing code states at 408.3, " Bidet water temperature. The discharge water temperature from a bidet fitting shall be limited to a maximum temperature of 110 Degrees F. by a water temperature limiting device conforming to ASSE 1070."

house plumber · 08-24-2010, 04:36 PM

Quote:

Originally Posted by Piperat

Couldn't that requirement be met simply by the hot adjustment limit stop on say a moen positemp valve? Of course if someone cranks the water heater up this temp will rise also.

No its talking about deck mount faucets for like drop in tubs

SewerRatz · 08-24-2010, 05:43 PM

Matt quick question about our code. Does the following apply to Tankless water heaters?

Section 890.1220 Hot Water Supply and Distribution

8) Direct Fired Instantaneous Heaters. (Storage tank of more than 64 fluid ounces.) Direct fired instantaneous water heaters shall be equipped with a thermostatic mixing valve or valves which conform to ASSE 1017-1999. A pressure relief valve shall be installed on or adjacent to the heater. A properly sized temperature and pressure relief valve, based upon the energy input rating of the heater, shall be installed on the tempered line with the temperature sensing element immersed in the tempered water line as close as possible to the mixing valve.

**ILPlumber** · 08-24-2010, 06:30 PM

Quote:

Originally Posted by SewerRatz

Matt quick question about our code. Does the following apply to Tankless water heaters?

Section 890.1220 Hot Water Supply and Distribution

8) Direct Fired Instantaneous Heaters. (Storage tank of more than 64 fluid ounces.) Direct fired instantaneous water heaters shall be equipped with a thermostatic mixing valve or valves which conform to ASSE 1017-1999. A pressure relief valve shall be installed on or adjacent to the heater. A properly sized temperature and pressure relief valve, based upon the energy input rating of the heater, shall be installed on the tempered line with the temperature sensing element immersed in the tempered water line as close as possible to the mixing valve.

What is the fluid capacity of the tankless WH? You have your answer.

08-24-2010, 10:09 AM	#24
Protech ٩(͡๏̯͡๏)۶ Join Date: Sep 2008 Location: Polk County, Florida Posts: 7,167 My Photos	I have never heard of such a requirement. You almost never see mixing valves except on a few commercial applications. __________________ Plumber, Repiping, Replumbing, Leak Detection, Solar Water Heater, Drain Cleaner, Pipe Leak, Polk County Plumber, Lakeland Plumber, Winter Haven Plumber, Haines City Plumber, Bartow Plumber

08-24-2010, 05:43 PM	#29
SewerRatz Illinois Licensed Plumber Join Date: Apr 2009 Location: Chicago Area Posts: 2,706 My Photos	Matt quick question about our code. Does the following apply to Tankless water heaters? Section 890.1220 Hot Water Supply and Distribution 8) Direct Fired Instantaneous Heaters. (Storage tank of more than 64 fluid ounces.) Direct fired instantaneous water heaters shall be equipped with a thermostatic mixing valve or valves which conform to ASSE 1017-1999. A pressure relief valve shall be installed on or adjacent to the heater. A properly sized temperature and pressure relief valve, based upon the energy input rating of the heater, shall be installed on the tempered line with the temperature sensing element immersed in the tempered water line as close as possible to the mixing valve. __________________ Ron Hasil Lic #058-160417 A-Archer Sewer & Plumbing specializing in: Tankless Water Heaters \| Drain and Sewer Cleaning Sump and Ejector Pumps \| Backflow RPZ Testing

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