Discovery tube gauge port spec?

[Digeraro]

Hi all, checking to see if anyone knows the exact distance from the breech end of the disco tube to the center of the gauge port opening of the tube?

Petty sure of this but just want to confirm that the stock gauge block is threaded 1/8 npt?

Don't have a disco tube on hand. Have an idea for a new build and to take some measurements to see if it could be done.

Thanks, Kenny

[rsterne]

From the front of the tube itself to the center of the gauge hole is 19-3/4"....

The threads in the gauge block are NOT 1/8"-27 NPT, they are straight thread, not tapered, and sealed at the bottom of the gauge adapter with a small O-ring.... IIRC, the threads are 3/8"-24 NF.... The Disco gauge adapter is 1/8"-27 NPT on the female end where the gauge threads in....

The PRod gauge block IS threaded 1/8"-27 NPT, because the gauge threads into it directly.... In addition, the through hole is MUCH larger, making it a good choice for a modded gun....

Bob

[Digeraro]

Thanks Bob appreciate the info!

I'm thinking about another reg.bottle build very similar to the one I just finished below.
https://www.gatewaytoairguns.org/GTA/index.php?topic=134175.msg1337339#msg1337339

This time instead of using a 2260 tube/2240 valve/dummy cart. Just go with the disco tube/valve and plumb the ninja tank though the gauge port. That way I'd have way more of a plenum and volume. I really like the balance of the tank under instead of forward.

If the disco tube is 25- 5/8" and the gauge opening is 19- 3/4" from the muzzle end of tube... The gauge opening would be about 5- 7/8" from the breech end of tube. This would only allow about 1-1/16" from the trigger guard. I need about 2-1/2"to allow for the ASA on/off adapter. So I would not have room using the same plumbing as last build.

I could however use a 90' then go into a in-line ASA adapter/on-off.
https://palmerspursuit.com/collections/adapters/products/pps-aluminum-round-asa-stainless-1-8-npt
https://palmerspursuit.com/collections/adapters/products/round-ca-adapter-825x14-to-1-8-npt-female

Anyway thanks again and if I get this together I will go with the P-Rod gauge block.

Kenny