I finally have my greenhouse and system set up and was doing water siphon tests when I encountered a problem I don't know how to fix. When I made my bell siphon I used the breather tube and have the cap - all the stuff that is recommended on various videos on YouTube.
Things started off great - the drip began then the full siphon flow started and then, with about another inch or 2 to go before even getting the water level down to the cap's rim, everything stops dead. At first I thought I had made my breather tube too long, so trimmed it just a bit with no change.
I did not create a trap under the grow bed as I thought that had more to do with getting your siphon started. I do plan to make a trap and see if that fixes the problem of maintaining the flow, but wanted to ask if anyone has had this problem before and how did you resolve it?
Thanks for your help. If you would like, you can check out my blog page to see more about my system and the progress I've made to date.
Maybe I was missing photos that show it but I'm curious about how long your drain lines are going from the bell siphon to the sump. Does it have enough length to hold enough water weight to suck more water up the inside of the bell?
posted 6 years ago
Thanks, Bill. That is going to be my next step. The trap wasn't long enough - none of the videos I watched really explained that part well enough for me to understand. I did go on Bell Brook Farms' facebook page (Web4Deb) and managed to get that same suggestion. I had to saw off the trap since I'd already cemented it on, and have to buy some more elbow joints and make a new one.
My question is how long does it need to be below the bed before the trap?