I replaced the manual bilge pump hose in our boat with 1-1/2”ID Trident 147. It was a real battle getting it through several very tight spots, and I wasn’t able to run it directly into the bilge, but will need to use an elbow to get there. Problem is that it’s impossible to get it over the ridges on the PVC elbow I’ve got. I was able to get it to slip over the Whale pump fittings, and the mushroom vent fitting, but those were all smooth connections. Is there an elbow out there that has smooth connections? I haven’t been able to find one yet. There’s a Whale EB3488 elbow I found, but the picture looks like only one end is smooth. I’m working on sanding down the ridges on the PVC, but it’s pretty slow going.