2018 Tab400 Valve Configuration

tonygebely

I have yet to find a diagram that matches or instructions that are directly applicable to the valve / plumbing configuration of our 2018 Tab400. Even the dealer wasn’t 100% sure of the purpose of each valve.

I have numbered them 1-4 in the attached image. Here are my attempts at identification:

#1 - low point drain, hot?
#2 - this seems to duplicate the Alde relief valve (as both valve #2 and #4 are part of the same run). When I opened it up to winterize, hot water came out.
#3 - low point drain, cold?

#4 - this is the “Alde relief valve,” This drains water out of the boiler correct?

Can anyone please help me verify?

We winterized using the blowout method, so I think we’re properly winterized, it would just help me to know the purpose of each of these valves.

Thank you so much!

Tony

qhumberd

Try this video from Patrick of Travels with Delaney on drain valves. It shows your configuration without Alde Flow in a 2018

https://youtu.be/38sqyG5-ow4

Denny16

Correct, the three valves (1,2,&3) are your low point drains, as follows:
 1- Hot water lines to sinks and shower
 2- Alde hot water tank drain
 3- Cold water lines to toilet, sinks and shower.

The yellow valve (No. 4 in your post), by the Alde heater, is a pressure overflow valve, you do not need to open this to drain the hot water tank, as low point drain valve #2 does this, and is easier to reach.
 Cheers 

tonygebely

qhumberd said:

Try this video from Patrick of Travels with Delaney on drain valves. It shows your configuration without Alde Flow in a 2018

https://youtu.be/38sqyG5-ow4

That video was super helpful @qhumberd, thank you, exact same config!

Denny16 said:

Correct, the three valves (1,2,&3) are yiur low point drains, as follows:
 1- Hot water lines to sinks and shower
 2- Alde hot water tank drain
 3- Cold water lines to toilet, sinks and shower.

The yellow valve (No. 4 in your post), by the Alde heater, is a pressure overflow valve, you do not need to open this to drain the hot water tank, as low point drain valve #2 does this, and is easier to reach.
 Cheers 

@Denny16 thank you so much for confirming, I really appreciate it!