2024 APH (Update)

[Justice_Drencher]

Recently building a APH, total cost in the high hundreds or low two hundreds. I could not find 3” sch 40 but I did find cellular core. There are a few differences however. I used only parts from Home Depot so that is something to consider. The pressure chambers thread since they didn’t have solvent ones. The nozzle instead of threading on it threads in. Love to here your feedback on this here’s some pictures

[SSCBen]

Glad to see people still building!

I should really redo the APH page, as the costs need to be updated and I would make some changes to improve safety.

I wouldn't recommend cellular core pipe for the pressure chambers. And the 3" to 2" reducers I used originally (same ones you're using here) usually aren't pressure rated, so I would suggest taking a different approach. You can find all pressure-rated components online easily (not easy in stores), say on McMaster. Instead of the reducing coupling and bushing you use now to go from 3" to 3/4", I'd probably end up using a big 3" to 3/4" reducing bushing like this on McMaster along with a 3" straight connector like this on McMaster. This will be heavier and more expensive, but much more durable and safer. You can verify these are pressure rated by checking the "Specifications Met" for "NSF/ANSI 61" or "NSF-pw" (also written on the pipe and fittings).

Fortunately, even if you've cemented everything together, with threaded pressure chambers, you can swap them out later. And the pressure you can get with a hand pump usually aren't an issue even with non-pressure rated components, or at least I haven't heard anything on that. (Non-hand pumped things are another story entirely.)

[Justice_Drencher]

Thanks for responding Ben. Currently I have cemented and used the water gun and I have good and bad news. Now don’t worry nothing exploded and no one got hurt. The good news is the riot blast is very good and is on par with a flash flood riot blast. The bad news is that the main nozzle is sub par for homemade standards. I have a couple theory’s why this is. Number 1 I have only pumped it up to half power due to the screw in chambers leaking at the joint. This could be fixed however I’ll just add Teflon to the joints. Number 2 is potentially what could be a debilitating issue that can’t be fixed for this homemade. This being the fact that the male screw in joint is smaller than the 3/4” tube that the chambers release water into. This I imagine is a major inefficiency in this APH that could be contributing to this. Besides that though the screw in pressure chambers I see can be a tactical advantage on the battlefield so I’ll have to try out swapping. Lastly the pump I made extra long because i believe that long pumps can do things that short pumps can but not vise versa. This may not be true but it’s what I see. I have 2 short videos of the gun shooting but I’m not sure how to post them here. But that’s pretty much it since this is a short essay at this point.

-once again again…(all right u get the joke by now)

Justice Drencher

[Justice_Drencher]

Quick update I’ve fixed the issue turns out Teflon did the trick. Now I’m getting great range and power. The riot blast now is even more potent and I’ve made some nozzles that I would like to share.(note this is subject to change I will make more as time goes on.)