i finished my Primo raincap. I used a 6 inch to 4 inch vent pipe reducer, a 4 inch vent pipe cap, and a 6.5 inch ring clamp (all in the plumbing isle). I had to use aviation snips to cut the bottom ring off the reducer (its held in by 2 rivets) and I had to snip the vent cap to make it fit inside the 4 inch reducer (both are designed to fit over vent pipes). The cap is held on the reducer by 2 screws. I clamp the cut ring to the Primo cap, and the reducer is held on by compression.
Leas than $20 for everything. And it works. South Florida tested. I think it would stay on in a category 1 hurricane. So no need to worry about the usual summer rain, no matter how much is dumped.
The only drawback is adjusting the top vent airflow requires removal of the rain cap. But you really don’t have to do much (or any) adjustment once it’s runninf how you want so I call that an acceptable compromise.
Leas than $20 for everything. And it works. South Florida tested. I think it would stay on in a category 1 hurricane. So no need to worry about the usual summer rain, no matter how much is dumped.
The only drawback is adjusting the top vent airflow requires removal of the rain cap. But you really don’t have to do much (or any) adjustment once it’s runninf how you want so I call that an acceptable compromise.
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