whats this on the water heater?

[Joseph Tribuzio]

I cant figure what the thing is on the water heater with the black cap --can someone please help me out?

[Bob Elliott]

Originally Posted by jtribuzio

I cant figure what the thing is on the water heater with the black cap --can someone please help me out?

Attachment 36965

My only thought, is some kind of water hammer arrestor.

[Joseph Tribuzio]

Originally Posted by belliott

My only thought, is some kind of water hammer arrestor.

yeah your right - that is what i seems like - but i hate to assume.

[Michael Larson]

N36

Water Service Vacuum Relief Valves

Size(s):

1/2, 3/4 in. (15, 20mm)

Description:

Series N36 Water Service Vacuum Relief Valves are used in water heater/tank applications to automatically allow air to enter into the piping system to prevent vacuum conditions that could siphon the water from the system and damage water heater/tank equipment. It consists of a brass body construction with NPT male inlet connection, and a protective cap. Series N36 has a low profile design, is tested and rated to ANSI Z21.22, and is CSA certified. It is suitable for low pressure steam and water service, and is ideal for use in domestic water heaters and supply tanks, table top heaters, jacketed steam kettles, unit heaters, low pressure steam systems, and steam coil heaters. Maximum Working Pressure: 200psi (14 bar), Maximum Steam Pressure: 15psi (103.4 kPa).

http://www.watts.com/pro/_productsFu...&pid=815&ref=2

[Bob Elliott]

Have you ever seen one hooked up to a HWH before?
It looks like a radiator knob,so it's funny that it can handle steam.

[Michael Larson]

Originally Posted by belliott

Have you ever seen one hooked up to a HWH before?

No Bob but I knew it was a Watts from its shape.

It's part of their water heater safety protection line.

[Bob Elliott]

I just found an excerpt from the Illinois water heater code that states they are to be used when the fixtures are below the tank.

Joe was the HWH in the attic or top floor.?

Here is the excerpt........

f) Vacuum Relief Valve. Where a hot water storage tank or water heater is located at an elevation above the fixture outlets in the hot water system, or if the storage tank or water heater is bottom fed, a vacuum relief valve as listed in Appendix A, Table A (Approved Standards for Plumbing Appliances/Appurtenances/Devices) shall be installed on the storage tank or heater.

Link to the page.....
http://www.ilga.gov/commission/jcar/...00I12300R.html

[Bob Elliott]

Off subject ,but an interesting tie in for Illinois Inspectors regarding the many posts on relief valves.

Any piping used for discharge from the relief valve shall be of metallic material and conform with the requirements of Appendix A, Table A (Approved Materials for Water Distribution Pipe) for potable water piping and shall drain continuously downward to the outlet.

[Jeffrey R. Wicklander]

Originally Posted by belliott

Off subject ,but an interesting tie in for Illinois Inspectors regarding the many posts on relief valves.

Any piping used for discharge from the relief valve shall be of metallic material and conform with the requirements of Appendix A, Table A (Approved Materials for Water Distribution Pipe) for potable water piping and shall drain continuously downward to the outlet.

Yeah.....and dishwashers can't drain into the garbage disposal. But how many times do you not write that up...

Jeff

[Bob Elliott]

Originally Posted by jwicklander

Yeah.....and dishwashers can't drain into the garbage disposal. But how many times do you not write that up...

Jeff

On my very last Inspection as a matter of fact Jeff.
I used to install all that stuff.

I am very a-nl on my reports.

The disposal has potential for cross contamination to the dishwasher.

In the city ,plastic water line is a no no.

[Dale Duffy]

Originally Posted by belliott

On my very last Inspection as a matter of fact Jeff.
I used to install all that stuff.

I am very a-nl on my reports.

The disposal has potential for cross contamination to the dishwasher.

In the city ,plastic water line is a no no.

I've never seem one like that here Bob.

[Dale Duffy]

Originally Posted by jtribuzio

I cant figure what the thing is on the water heater with the black cap --can someone please help me out?

Attachment 36965

Learn something everyday Joe...I have never seen one on a water heater configured like that.

[Bob Elliott]

Originally Posted by dduffy

I've never seem one like that here Bob.

If you mean the vacum breaker ,I never noticed one while Inspecting.

How Larson comes up with these pictures ,I will never know.
Guessing he has a picture recognition software or he is Vulcan.

[Jeffrey R. Wicklander]

Originally Posted by belliott

On my very last Inspection as a matter of fact Jeff.
I used to install all that stuff.

I am very a-nl on my reports.

The disposal has potential for cross contamination to the dishwasher.

In the city ,plastic water line is a no no.

Most of the time we will see the attachment to the disposal. If the hose is attached well above the bottom of the sink, I will rarely call it out.

Jeff

[Bruce M. Graham]

You could ask Mike Meeker he should know