Polaris PB4-60 Reinforced Hose Collapse

[Leon788]

Anyone here have a similar issue or can answer my question? Every couple of years I have to replace the reinforced hose from my booster pump, a PB4-60 to the pool. It seems to collapse on itself and flattens. When it does this, it drastically reduces the polaris 280's efficiency. The hose also develops some oily residue on
the outside. I have just replaced the hose again but I would love to know what causes this. A few photos attached.
Thanks

 

[JamesW]

Can you show the whole system?

 

[Leon788]

System Photos

 

[JamesW]

Maybe damage from the tab feeder.

Maybe the ball valve was left closed.

Maybe due to the twist in the line.

Maybe running with no flow when the main pump shuts off.

 

[Leon788]

Thanks James....I'll try to re-configure and see if that helps....The problem is it doesn't happen over night...it seems to do this over a lengthy period of time...months to a year it seems.
Thanks for you input.

 

[1poolman1]

Thanks James....I'll try to re-configure and see if that helps....The problem is it doesn't happen over night...it seems to do this over a lengthy period of time...months to a year it seems.
Thanks for you input.

Ditto on the tab feeder. When the system is off the tabs are still dissolving and the "soup" that results is heavy. That "chemical resistant" check valve, just before the feeder, fails very quickly, you can't see it, the very corrosive liquid will fall down the return pipe and can end up sitting in the hose, and the booster pump, causing damage.
You would do well to replace it with a SWG, or at least not use it and place tablets in a floating dispenser that adds a little bit of chlorine 24/7 and won't damage your equipment.
That corrosive liquid can also flow back toward the MPV and damage the spider gasket when the check valve fails.

The next time you replace the hose, try to get a Waterway booster-pump hose kit. Different hose that seems to last longer.

 

[Leon788]

We originally had a SWG but I got tired of replacing those when they fail at over $1000 a pop. Our pool guy installed the tab feeder but we don't use it. We use liquid chlorine to sanitize the pool.
Thanks....I'll look at the waterway hose kit.

 

[JamesW]

You can use regular PVC to plumb it.

 

[TinFoilHat]

Your SWG was probably failing due to incorrect water chemistry. Get the basics down pat first and then you'll set yourself up for success with the SWG. Like with the Waterway hose, money spent properly now will pay off in the future with reliability and a clean pool.

 

[sktn77a]

Is the Polaris pump noisy? I suspect it isn't getting enough water supply, essentially "sucking" the hose flat. Try taking it's water supply immediately after the filter.

 

[Lake Placid]

Get rid of the excess hose with the coil. Cut just enough to be a direct straight routing of hose to the valve. The excess coil is putting the hose under tension/stress….then you have UV, suction, heat and everything else working on it. Thus the tension you put on it in the coil becomes the failure point. Or do what James suggested and hard plumb it….then you don’t have to worry about it.