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Garden Hose Quick Connect that Won't Restrict Volume

Old 07-10-2019, 08:09 AM
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Default Garden Hose Quick Connect that Won't Restrict Volume

I have a flush system for my Cummins QSCs. Made a manifold to which I connect a garden hose that runs, other end goes in the fish box that I fill with water. Close the seacock to the engine raw water and let the engine suck water through the manifold through the strainer cap.

Problem is every time I use the system I have to screw the hose into the manifold, and the fitting I use to do that sticks sometimes when I turn it onto the male end of the hose.

Would love a quick connect but the engine is already sucking as much as the hose can take. Is there a quick connect that won't further restrict water flow? Actually now that I'm thinking about it since the water has to pass through 2x3/4" ball valves maybe it doesn't matter since it's already passing through a smaller area?
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Old 07-10-2019, 08:43 AM
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Everything added to that path will reduce / restrict flow.

Use a system w/ the least fittings possible to provide the greatest flow.

Garden hose connections are "small" to start but a frequently a necessary evil.

Operate the flushing engine only at idle.
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Old 07-10-2019, 04:02 PM
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Originally Posted by wingless View Post
Everything added to that path will reduce / restrict flow.

Use a system w/ the least fittings possible to provide the greatest flow.

Garden hose connections are "small" to start but a frequently a necessary evil.

Operate the flushing engine only at idle.
Thanks. Was actually thinking of removing the ball valve on top of the strainer cap but I like being able to shut that off in case the hose going from there to the manifold ever detaches or springs a leak.

Would having two connections of the same diameter really slow it down versus having one connection of that diameter?

Yes only flush at idle.
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Old 07-10-2019, 04:03 PM
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We put a y valve with Hose in the intake line can use as crash pump or flush motor , pvc threaded end and cap on hose. Fitted a garden hose fitting to an extra cap to hook to hose . white vinegar flush keeps scale out of coolers , then barnacle block flush once yr
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Old 07-10-2019, 05:47 PM
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Originally Posted by donald/tri-again View Post
We put a y valve with Hose in the intake line can use as crash pump or flush motor , pvc threaded end and cap on hose. Fitted a garden hose fitting to an extra cap to hook to hose . white vinegar flush keeps scale out of coolers , then barnacle block flush once yr
Hadn't thought of using PVC as a solution. Don't think glue would be required since the suction will keep everything in place. Just some lithium grease to be able to disconnect quickly. Could just attach a PVC hose adapter to the manifold and on the hose that goes to the manifold use a the same thing with a coupler to fit on the adapter on the manifold. Time for a trip to Home Depot.

I like that idea--thanks!
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Old 07-10-2019, 07:39 PM
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No reason not to go larger than 5/8 from your hose connection if you go PVC. I usually run 1" on everything so I have a big pass thru valve and then a reducer going to your manifold. Your smallest points will be the beginning of your hose and the manifold.

Am I reading it right that you want to grease the fitting to switch between your RW pickup to cool your motor and also switch to a flush?

Go with a larger 3/4 garden hose to increase flow if you can.
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Old 07-10-2019, 10:05 PM
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Originally Posted by Killer&Griller View Post
No reason not to go larger than 5/8 from your hose connection if you go PVC. I usually run 1" on everything so I have a big pass thru valve and then a reducer going to your manifold. Your smallest points will be the beginning of your hose and the manifold.

Am I reading it right that you want to grease the fitting to switch between your RW pickup to cool your motor and also switch to a flush?

Go with a larger 3/4 garden hose to increase flow if you can.
The manifold has a ball valve to a street elbow to a female hose adapter (3/4" NPT on the elbow side). I usually run the hose to that adapter. Thinking of removing the hose adapter and instead going with a PVC NPT female to the street elbow (straight PVC on the other end) and then doing a PVC hose adapter to the hose (with straight PVC on the other end) and mating the two with a PVC coupler that I just grease on the inside so I can disconnect easily when done flushing.
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Old 07-10-2019, 11:01 PM
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Originally Posted by LuvBigBoats View Post
and mating the two with a PVC coupler that I just grease on the inside so I can disconnect easily when done flushing.
Consider trying it without the grease first, the water will lube it a touch yet still stay firmly in place.

I put a 4 way tee in for a buddy. Obviously the in and out were straight. On the other 2, I put 2 pieces of pvc pipe that were about 3" to 4" and then a cap or plug on both. This give him the ability to have a handle to wiggle or turn kind of like a 4 way tire iron. It also was nice to pull on with wet hands. He used some flex hose inline on his. Food for thought.

Post up your final project with a few pics.

Good luck
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Old 07-11-2019, 07:36 AM
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Originally Posted by Killer&Griller View Post
Consider trying it without the grease first, the water will lube it a touch yet still stay firmly in place.

I put a 4 way tee in for a buddy. Obviously the in and out were straight. On the other 2, I put 2 pieces of pvc pipe that were about 3" to 4" and then a cap or plug on both. This give him the ability to have a handle to wiggle or turn kind of like a 4 way tire iron. It also was nice to pull on with wet hands. He used some flex hose inline on his. Food for thought.

Post up your final project with a few pics.

Good luck
I like that 4-way idea too--thanks. Would make for good leverage. A pic of the manifold is attached.
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