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Old 09-27-2018, 05:56 PM   #1
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Home made Groco flush system.

I decided to build my own flush system.

The photo shows everything but the reducer, not delivered yet.

The Groco 500 has a 3/4" hose outlet. The cap threads measure about 2.75" OD. Actual thread size is 2.5".

I found the 2.5" threaded fitting and reducer bsng to 3/4" at Grainger for about $5.00.
Grainger number 22FM38, 22FM30

The 3/4" nipple and female hose bib are from Home Depot, about $ 4.00.

This setup is for flushing only, not for permanent installation. I use it to backflush the strainer, then flush the engine or ac. If you wanted to fresh water pickle, just close the seacock. I plan to use it on all three of my strainers as I clean them.

A simple system.
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Old 09-27-2018, 09:46 PM   #2
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Looks interesting, but be careful! Your raw water system operates under vacuum. I have encountered dock water pressures as high as 80 PSI. Don't think your Groco strainer was designed to handle that kind of pressure.

Ted
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Old 09-27-2018, 09:54 PM   #3
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Maybe you can post some photos when it is all complete and setup for use. Interesting idea.
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Old 09-28-2018, 07:13 AM   #4
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Will post pictures when I use it.

They backordered the reducer, but it is shipping to the next marina.

This can also be used to blow air through the system. But, it is easier to do that with a shop vac.
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Old 10-04-2018, 08:48 AM   #5
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Here the parts are in order of assembly.

I will cut the threads off one end of the nipple and glue it in.
The other end is threaded so I can attach an air line or something.
Hose connection attaches there.

With this you can fresh water pickle the system for storage.
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Old 10-04-2018, 08:51 PM   #6
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Quote:
Originally Posted by Choices View Post
Here the parts are in order of assembly.

I will cut the threads off one end of the nipple and glue it in.
The other end is threaded so I can attach an air line or something.
Hose connection attaches there.

With this you can fresh water pickle the system for storage.

Choices,

I did something similar. The threaded piece screws into the strainer, short length of 2" PVC into the socket. Then cut a hole in the bottom of a 5 gallon bucket, and connect the short 2" PVC whth a flange. It was great for flushing, Just fill the bucket to start and keep the hose in the bucket at idle. Nothing glued to make storage easy. Barley weeped.

For winterizing fill bucket with antifreeze. Had to pour in 2 more to get good pink out of my Cummins 5.9.

Unfortunatly, no pictures. I let it go with the boat in June.

Rob
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