This one did not work well for me. A friend of mine had this one and I borrowed it to siphon stale DEF from a truck. I tried it out in a bucket of water first and the max height I could raise the water level in the hose, above the water in the bucket, was 8 inches. Beyond that the water leaked back into the bucket as fast as I could pull it into the hose by shaking the end.
I think the poor performance is inherent to the design of the mechanism. A copper to copper seat is not going to seal well and is going to allow a fair bit of leakage. The short travel of the ball moving up and down allows only a small quantity of liquid to be sucked in and it promptly leaks back out.
Perhaps a design with a longer travel would perform better.
The hose was long enough, at about ten feet, so I just sucked on the end of the hose and established the siphon and got the DEF out, without injesting DEF.
I think the poor performance is inherent to the design of the mechanism. A copper to copper seat is not going to seal well and is going to allow a fair bit of leakage. The short travel of the ball moving up and down allows only a small quantity of liquid to be sucked in and it promptly leaks back out.
Perhaps a design with a longer travel would perform better.
The hose was long enough, at about ten feet, so I just sucked on the end of the hose and established the siphon and got the DEF out, without injesting DEF.
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