Fill nipple installation and anti-siphon installation.

[Boydster]

I need help with these two tasks. The fill nipple causes problems at the fill station so I replaced it. Seems easy enough to get on but do I need any teflon tape or loctite or anything?

And I also need help with the anti-siphon installation.

If you have a link to a site that explains either of these, please give it to save a lot of your time. Thanks.

[trains are bad]

I would use a drop of blue loctite on the fill nipple. That or tape or other sealant, don't do it dry.

For an antisiphon, you need a bench vise and a sturdy strap wrench, I use one designed for oil filters. MAKE SURE it's empty, clamp the valve in the vise and screw the tank off.

Go to napa and buy a piece of brake line, or other metal line like copper tubing and a 1/8" threaded compression fitting for it. Or you can buy just a 1/8" pipe plug, drill and solder the tubing into it.

take the plug out of the back of the valve and put your fitting into it. Use loctite because it may not get tight without overcompressing the valve spring. Screw the valve into the asa your are using it on and install the appropriate size and shape of line into the fitting. you want the line to be almost on the wall of the tank. The length is more preference, I use short ones. I also smash the end of the tubing flat and solder it all but a tiny hole maybe .030".

screw the tank back onto the valve and let the loctite dry.

oh yeah make sure you mark the tank so you know which way is up.

[Boydster]

Thanks.

So I can use any kind of sealant for the fill nipple? Doesn't matter at all?

I already have an anti-siphon thing. I just need to get it in. Thanks for typing all that out for me.

[frischtr]

Thanks.

So I can use any kind of sealant for the fill nipple? Doesn't matter at all?

I already have an anti-siphon thing. I just need to get it in. Thanks for typing all that out for me.

Loctite 545 (purple)...

[Boydster]

Loctite 545 (purple)...

All I have is the red stuff. That good or not? Well, I have teflon tape also but I'm sure loctite is best.

[trains are bad]

I like loctite. I use blue. Red would work great till it's time to take it back out.

If I didn't have blue loctite, I'd buy some, but if I couldn't I'd use my permatex thread sealant. I hate teflon tape.

[Andrew Cunje]

yellow teflon tape works....its made for air lines....get it at any hardware store

[Boydster]

Does the fill nipple have 3000 psi behind it or not? I was thinking that it might shoot out if I didn't loctite it at first. So all I need is to stop a leak caused by a low pressure like 800psi? It needs to be treated just as a macro fitting? Shoot, teflon would work fine then.

[frischtr]

Sorry, this is a little old... I wouldn't mess around with the HP fill nipple without wusing the proper sealant... That's a lot of pressure... 545, the purple, works great... White teflon tape is actually only rated for about 125 psi, not sure about yellow... The blue and red loctites are threadlockers, not thread sealants... They would probably be fine at 800, but I would be leary of using them on a HP fill nipple... Call a local airsmith to find out for sure...

[Boydster]

The white stuff seems to be working. I installed it with that and yesterday I was at the field, got it filled, and it seems to be working. But I guess I'll get some better stuff.

Will the highest rated stuff be compatible with everything? Can I put purple on air hoses? And an extreme pressure thing? LMK if that makes sense.

[wanna-b-ballin']

this is coming straight from the instructions that came with my PMI 68/4500. i think it applys to other tanks also.

"when installing the fill nipple, DO NOT OVER-TIGHTEN. over-tightening will limit the available strut travel, and cause failures of the o-ring on the check strut. always check strut travel after installation. shake the bottle to be sure you hear the strut moving back and forth"

from looking at the blown-up-diagram it appears that the check strut is between the fill nipple and a little o-ring.

in order it goes from the body - then o-ring - then check strut - then fill nipple.

i'm not sure how clear this is to anybody but me, so yeah, i tried to help.

[Boydster]

Thanks. I know what you mean.
I may have over tightened it actually. I'll have to take a look at that. Thanks.

[frischtr]

The white stuff seems to be working. I installed it with that and yesterday I was at the field, got it filled, and it seems to be working. But I guess I'll get some better stuff.

Will the highest rated stuff be compatible with everything? Can I put purple on air hoses? And an extreme pressure thing? LMK if that makes sense.

Purple works great on any SS fitting or fill nipple, rated for up to 10K psi... Allow 24 hrs to cure...