I'm looking for advice on how to connect two corrugated filter hoses together to make a hose long enough to connect my skimmer to my pump. The previous owner used a barbed insert x insert coupling (attached image) to connect the two old hoses (attached image) I need to replace.
I've tried putting a hose on either end of the coupling, but I can only get the hose up to the first one or two barbs/ridges of the coupling, and not all the way on. This is not tight enough to prevent the connection from leaking (even with magic wrap pipe tape plus a clamp at both ends - I am getting desperate!)
Does anyone have advice on what I should use to get the hose all the way on the barbed connection? Should I just use some sort of lubricant? If so, what type should I buy? Should I use primer and glue? The guy at the hardware store said I wouldn't need that, but now I'm starting to wonder... I also saw someone mention on another post to try using boiling water or a hair dryer to heat up the ends to make the connection easier. Would that be sufficient to get them connected and secured, or would I also need to use some sort of sealant?
Any advice would be much appreciated!