The wc connection is way to big and leaks .A wc outlet is 110mm your connection is 180mm approximately so easy to big.You also do not supply a hose clamp big enough for this over sized wc connection. I had to join 2 hose clamps together but it still leak causing me a call back thing like this cost me money.I am still waiting for the second pump to be delivered .
Regards Colin Linfield from Linfields Plumbing Heating & Drainage