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Old 01-09-2023, 10:27 PM   #1
slider2828
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DIY Boost Leak Tester

I know people do write ups all the time on forums about Boost Leak Testers, but they never really have part numbers and some even use bike pumps and tire valves (I prefer compressor fitting), fitting information, or how to use em....

So here it is. I bought these parts from my local Home Depot and posted how they fit up from left to right

Left most is the 1/4" air fitting, your most standard compressor fitting
(Item Number 989 743 - Husky1/4 in. NPTM Industrial Plug)

to 1/4" air adjust valve.
(Item Number 531 048 - Husky1/4 in. In-Line Air Adjustment Valve With Gauge)

Also there you can have also a 1/4" swivel lead in hose. This just makes life easier in hard to reach places and have about of agility for angles and stuff.
(Item Number 1006 966 667 - Husky 3/8 in. x 30 in. Hybrid Lead-In Hose). Reads 3/8 but really its 1/4" connections

Then that goes into 1/4" to 1/2" hex bushing
(Item Number #1003190921 - 1/2 in. x 1/4 in. Black Malleable Iron Bushing Fitting)

That 1/2" goes into a 2" pvc thread reducer bushing.
(Item Number #100343801 - DURA
2 in. x 1/2 in. Schedule 40 PVC Reducer Bushing)

Usually the 2" PVC outer diameter is a bit larger than 2" so you will need wrap the coupling with some duct tape and then use a 2 1/4" silicone coupling to whatever turbo inlet you have.

Get also a few hose clamps you have laying around to hold it together.

HOW TO USE: Basically for me, you do pressurize the system, but it never really holds compressed air. What you need to do is spray soapy water or listen or move your hand around your pipes to see air leaks or feel the air.

It shouldn't be egregious leaks like hold nothing, but if you pressurize to 20psi, it shouldn't leak more than like 2psi per second....

Let me know if you have had different experiences or correct if I am wrong

Pictures of the items below and how they fit


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