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Replies: 18
Views: 1,189
Posted By salty joe

The seller said there is no ferrous metal in the...

The seller said there is no ferrous metal in the PEX brass valves.

It would be simple enough to bypass the tankless WH and run the water through the 500' buried regular PEX, but don't want to do...
Replies: 18
Views: 1,189
Posted By salty joe

I am looking at PEX brand ball valves. They have...

I am looking at PEX brand ball valves. They have a brass body and Teflon seats, hopefully the ball is a decent grade stainless. I should have an answer in a day or two as to whether they are OK to...
Replies: 18
Views: 1,189
Posted By salty joe

OK, I'm looking at reduced pressure backflow...

OK, I'm looking at reduced pressure backflow preventers. How long do these units typically last? How do you know when one has failed? The reason I ask is I was looking at used as well as new.

The...
Replies: 18
Views: 1,189
Posted By salty joe

OK, I'll use PEX with an oxygen barrier. Thanks...

OK, I'll use PEX with an oxygen barrier. Thanks Furd.

There will be a 100' coil of PEX in the aquarium's sump as the heat exchanger.

When I was looking at polyethylene glycol I saw the type...
Replies: 18
Views: 1,189
Posted By salty joe

The aquarium is in a dedicated "fishroom". It's...

The aquarium is in a dedicated "fishroom". It's an inwall job and is viewed from the front room. The closed loop will be in the basement. The anti-freeze is to protect the direct vent tankless water...
Replies: 18
Views: 1,189
Posted By salty joe

Thanks NJ Trooper for that explanation. I like...

Thanks NJ Trooper for that explanation. I like not having to get an additional vent. (:

gilmorrie, the tankless will be gas fired. The aquarium and sump are about 800 gal total. Sometimes I'll...
Replies: 18
Views: 1,189
Posted By salty joe

Thanks gilmorrie. I did look at the watts...

Thanks gilmorrie.

I did look at the watts 9d online. The specs look ideal for my application. The word "vent" is stamped into the 9d beside what appears to be female NPT threads. Which led me to...
Replies: 18
Views: 1,189
Posted By salty joe

Thank you NJ Trooper! That's outstanding...

Thank you NJ Trooper! That's outstanding information-I appreciate it a lot.

Would the vent for the WATTS 9D be the same as one used on an air scoop?

If I use propylene glycol with a corrosion...
Replies: 18
Views: 1,189
Posted By salty joe

anti-freeze in closed loop?

I plan to use a direct vent tankless water heater in a closed loop to heat a large aquarium. A heat exchanger will be in the aquarium's sump. The smallest units I've seen have more than enough BTUs...
Showing results 1 to 9 of 9


 
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