Flexible hose restricting flow?

[coilerman]

I'm in the process of replacing my pump and am wondering about the outlet plumbing. The outlet port of the pump is connected to a flexible hose. It's white with a spiral construction. Outside diameter is 1.5".

The hose is attached to the filter and the pump by being pushed onto a barbed male fitting and then clamped with hose clamps.

I measure the inside diameter of the fitting and it's about 1-3/16".

I'm wondering if it's a bad idea to have the outlet pipe be a smaller inside diameter than the inflow. It's only about 1/8" difference but would that create back pressure that would shorten the life of the pump?

Here's a few photos of the hose in question. Would it be better to use rigid 1.5" pipe for the connection?

Hose

https://imgur.com/a/EKGO2Xr

Hose to pump

https://imgur.com/a/Ar4iWes

Hose to filter

https://imgur.com/a/fZRdZWk

 

[mknauss]

What is your filter pressure when running?

 

[coilerman]

I really don't recall and the pump has been disconnected so no way to check now.

 

[mknauss]

I doubt it makes that much difference. Lots of factors at play. How long is the run to the pool return(s), what HP is the pump, etc.

 

[coilerman]

I figured I was over thinking it but good to check. Just one more question - can I use the same cement that I use for the rigid PVC? I find that when dry fitting, the flexible pvc is a little looser when pushed into a female fitting. Wondering if the PVC cement will fill in the gap.

 

[mknauss]

I will ask some else to guide you on that -- @JamesW

 

[JamesW]

I would do all new 1.5" hard pvc from the pump to the filter.

There's a lot going wrong with what you have there.

 

[coilerman]

Can you be more specific?

 

[PoolguyinCT]

Chop it down to the risers & clean it all up.
Jamesw is correct; it’s a train wreck.

 

[coilerman]

Trainwreck in what way?

 

[JamesW]

It's flex pvc. You don't use it with barbed fittings and clamps.

Someone used a pipe-extender type fitting for some reason.

In any case, just get rid of what's there and replumb.

 

[coilerman]

That was a question I asked earlier, is flexible pvc joined the same way as rigid PVC? With primer and cement?

By pipe extender, do you mean the piece of white pipe coming off the filter? I put that in because I had to replace the sand filter o-ring and the original builder made no allowances for removing the head of the filter. It's ugly but I don't see how it's causing any problem.

 

[Pool_Medic]

Yes primer and cement. 795 glue

 

[coilerman]

Thanks. I will just reglue the flexible PVC for now. At a later date, I will look at replumbing. Just too much to think about right now. I still have the replace the heater and SWG at a later date so plenty of opportunities to replumb.