Plumbing question on having a check valve in the return. Keep in mind this is a basement sump setup and about 8' of height maybe 12' plumbing. I understand the need to allow for drainback and that isn't an issue as the sump is plenty big. I was concerned with a lot of splashing in the DT when the pump restarts. I read somewhere that is why one guy used one. I'll also have a tee off for my refugium section so probably get air in the line anyway. I'm thinking just leave it out but wondering how big an issue the surge/splashing is. Thoughts ?