Doubling Steel 72's

[acamato]

I have two steel 72's (1964 & 1965) that were given to me. Does anyone make a manifold for them? I believe that they are a 1/2" thread... Would bands for AL80s cinch down to fit them?

[acamato]

Is this what they used to use back then?



I found one for sale for $30...

[captain]

It depends what you mean by doubles. If you mean a manifold that can mout two regulators the answer is no. When those tanks were made there were no such things as dual outlet independent shutoff manifolds. All the manifolds were single outlet single shut off. That said you could find a single outlet 1/2" manifold on ebay such as this. But it is probably not what you are looking for, plus the guy is asking about $110 too much.

Vintage 1956 USD US Divers 1/2" Post Valve J Manifold - eBay (item 130281941425 end time Feb-15-09 19:14:30 PST)

[acamato]

Thanks. I will verify that the tanks are 1/2". If so, I only have two options get manifold that was posted above or run dual independent regs...

[navyhmc]

It depends on which 72's they are. Some were 6.8" while most are 7.25"-the same as 80's. Take a tape and measure the circumferance. If it's around 22 and 3/4" (22.765" to be exact) , it's a 7.25. If it's around 21 and 3/8" (21.352") it's a 6.8".

[captain]

Originally Posted by navyhmc

It depends on which 72's they are. Some were 6.8" while most are 7.25"-the same as 80's. Take a tape and measure the circumferance. If it's around 22 and 3/4" (22.765" to be exact) , it's a 7.25. If it's around 21 and 3/8" (21.352") it's a 6.8".

Maybe there are "new 72's" that are 7.25" D but all the "original 72's were 6.8" D and any with a 1/2 pipe thread is definitely an original.

[BSea]

When did they quit making 1/2 threads? I thought anything from 62 & beyond would be 3/4.

If they turn out to be 3/4 threads, there are several options for manifolds including the Sherwood model that has a center post and a right post. I have a set of 72's doubled with this manifold.

You can also get a set of reproduction bands to fit the tanks (6.8") at Vintage Double Hose. Here is a set on ebay right now.

[captain]

Originally Posted by BSea

When did they quit making 1/2 threads? I thought anything from 62 & beyond would be 3/4.

If they turn out to be 3/4 threads, there are several options for manifolds including the Sherwood model that has a center post and a right post. I have a set of 72's doubled with this manifold.

You can also get a set of reproduction bands to fit the tanks (6.8") at Vintage Double Hose. Here is a set on ebay right now.

There was some cross over years from about 60 to 63 when both 3/4 and 1/2 tanks were sold.

[acamato]

I will verify the threads tonight. Since thay were made in 64 & 65 hopefully thay are 3/4".


I have a fewquestions:
1/2" thread is NPT?
With the 1/2 valve I will be able to see the threads of the valve? it also uses teflon tape

3/4" valve is a std valve you would find in an al80? so there would be a flange that touch the tank (no exposed threads on the valve body)
3/4" is straight thread how many TPI?

[captain]

Originally Posted by acamato

I will verify the threads tonight. Since thay were made in 64 & 65 hopefully thay are 3/4".


I have a fewquestions:
1/2" thread is NPT?
With the 1/2 valve I will be able to see the threads of the valve? it also uses teflon tape

3/4" valve is a std valve you would find in an al80? so there would be a flange that touch the tank (no exposed threads on the valve body)
3/4" is straight thread how many TPI?

Correct with one exception, Sportsways (no longer in business) sold a steel 72 that used a 1/2" straight O ring sealed valve.
The 1/2 taper pipe, 1/2 straight, 3/4 taper pipe and 3/4 straight all are 14 TPI