I used a 1/2″ shank bit (basic drill bit). I think a butterfly bit might work, but it might jam and yank the drill out of your hands.
Part two should be along this weekend. It works great. I need to finish the skimmer before I can run water through it.
70 dollars . ik bought a new complete UVC 36 Watt for less than that on ebay.
I am still not sure how to make the pvc plug connect to the uv lamp without leaking?
It is not a pressurized connection. I have sized the PVC to the flow rate to allow for a gravity flow. The inlet is about 1/2″ higher than the drain.
This is a 110 watt system. A commercial system will use a quartz sleeve which is good for at least a 25% drop in UV transmission. GE did extensive research on this which is cited in Escobal’s book. Sometimes it makes sense to buy off the shelf. I have a large system and want a calculated sterilization capacity that works, is inexpensive to maintain, and doesn’t break my budget.
Brian, you are seriously a DIYer. You should out a forum that I’m on. diyfishkeepers.
Hey thanks…very good videos, I am planning to use your idea but would like to do it pressurized, using threated caps and silicone to seal the uv bulb to the cap…do you think it is safe? The problem is that my whole system is pressurized. Thanks
when you go pressurized you wind up with a variety of issues related to keeping the water in the system. Pressure ultimately causes leaks. Pressure also has a cost in terms of drag on the flow of water. Drag costs money in the form of pump energy. The concept I built will work fine and it’s safe provided a GFI outlet is used. The GFI will trip if there is a short. That said, I still unplug it any time I’m going to work on the sump or near the wires. Electricity demands respect.
how are you sheilding the bulb from being in direct contact with the water? what if the bulb breaks?
I’m not shielding the bulb. In the event that it breaks the GFCI would cut it off. The flow is low enough that the glass wouldn’t go anywhere and I would shut the system down and deal with it. It’s tempting to make it over complicated…. don’t. The bulb is quite durable. Provided you don’t hit it or otherwise shock it you should have no issues with breakage.
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