Does anyone know where I can buy pre made weir boxes which I can then just silicone to the walls around my drains.
My 2500L pond at the min is on two 50mm drains (bulkhead and then elbow) on a full siphon. It's working for the min but my sump won't take all that water if my pump fails.
My 2500L pond at the min is on two 50mm drains (bulkhead and then elbow) on a full siphon. It's working for the min but my sump won't take all that water if my pump fails.