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Forum: Plumbing Systems and Fixtures

05-06-2018, 00:17

Replies: 14

Vented Loops

Views: 4,374

Posted By transmitterdan

Vented Loops

A vented loop is usually required to prevent water siphoning into the stopped engine. Many engines have been ruined because the raw water system siphoned salt water through the seacock. It will...

Forum: Plumbing Systems and Fixtures

04-06-2018, 02:52

Replies: 14

Vented Loops

Views: 4,374

Posted By transmitterdan

Vented Loops

I don't know the brand for sure but this is a fairly common gravity type one way valve. Water pushing up to the top closes the valve. When the water flow stops then gravity lowers the valve and lets...

Forum: Plumbing Systems and Fixtures

08-04-2018, 13:42

Replies: 14

Vented Loops

Views: 4,374

Posted By transmitterdan

Re: Vented Loops

Your engine cooling is plumbed correctly. The rubber vane pumps are not completely one-way. Water can get past the vanes even if the pump is not turning. So it’s critical that the anti-siphon work...

Forum: Plumbing Systems and Fixtures

07-04-2018, 12:11

Replies: 14

Vented Loops

Views: 4,374

Posted By transmitterdan

Re: Vented Loops

The duckbill is not going to help this. Think about what is happening and you can see the problem. The pump is trying to suck seawater up and over the loop. But the duckbill is designed to let air in...

Showing results 1 to 4 of 4

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