3/4" hvlp plug/coupler connector?

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Forum topic by bringitonhome posted 08-28-2010 03:52 AM 2159 views 0 times favorited 3 replies Add to Favorites Watch
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28 posts in 2496 days

08-28-2010 03:52 AM

Hi folks – having a bit of a problem here.
Last year a bought a small hvlp system. It’s worked ok, but the gun leaves a bit to be desired. So, I purchased a new one and brought it home only to find that the connector wont fit. The gun has 3/8” NPT male threads (for which I had purchased a 3/8” quick connect plug). Turns out that my sprayer hose has a 3/4” quick connect coupler. It seems that 1/4” and 3/8” are the standard sizes. I’ve looked at both big boxes and HF, and they only carry those sizes. No 3/4” fittings to be found anywhere.

The old gun is cheap plastic and the plug is actually part of the body – so nothing to be reused there. Has anyone ever seen 3/4” fittings before? Or can anyone offer any clever ideas of how I can make this connection? :)


3 replies so far

View barryvabeach's profile


159 posts in 2464 days

#1 posted 08-28-2010 04:07 AM

Not sure I can be of much help. In general, the conversion guns use standard air quick connects – 1/4 normally the air pressure is set to 20 to 40 psi. . Turbine guns on the other hand usually have a much wider intake ( 3/4 is what Capspray uses

But the turbine generates air at 10 psi or less ( High Volume Low Pressure ) that is in part why the hose is much wider. The point I am trying to make is that if you get a conversion gun ( it converts high pressure air to low pressure air ) you can’t run that from a turbine, and if you have a turbine gun you can’t run that from a compressor. So I may have misunderstood, but it sounds like you have a turbine with a hose with a 3/4 fitting that you are trying to attach to a conversion gun ( though that would normally be 1/4 fitting ) if that is what is going on, a coupler won’t work.

View PurpLev's profile


8523 posts in 3069 days

#2 posted 08-28-2010 04:28 AM

from what it sounds like you got a gun that is to be used with a regular high-capacity air compressor and you’re trying to make it fit a turbine unit which uses different connections and hoses all together. I have not found anything that would make those 2 work as of yet.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

View bringitonhome's profile


28 posts in 2496 days

#3 posted 08-28-2010 09:24 PM

yes that’s exactly it!
i have a turbine system. I thought conversion gun – regulator = turbine gun. Guess not. It seems like the overwhelming majority of spray guns for sale are conversion guns. The few turbine guns i’ve found cost over $300. Some over $500. Since the whole rig cost me ~$120, that’s a bit more than i was looking to spend.

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