Salt-Water Pump question

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Salt-Water Pump question

Postby DPG » Tue 17 Mar, 2020 07:57

I'm hoping someone here can help me out a little.

My main circulation pump suffered a bearing failure recently. The pump is a Sta-Rite S5P2RF 1.5hp unit is only 3 years old and was installed by a local Pool Supplies Company shortly before I bought the property. The previous pump, (New when the pool was built) is thought to have been the same make/model and lasted 15 years+.

In the process of sourcing a replacement, I found out that the 'S' part of the pump model denotes a Salt Water pump. But my pool is a fresh water pool with a chorine tablet dispenser.

So, my question is this: Would using a Salt-water pump in a Chorine Pool cause a premature failure? I'm reading a lot that indicates that SW pools are less corrosive and that would seem to say that bearing seals might not last very long in chorine and maybe lead to early bearing failure?

For the record, I've ordered a Sta-Rite 5P2RF-1 1.5hp - which has the exact same flow/head/power consumption as the old S5P2R-1P. So I'll get it going again soon enough but I'd quite like to get the old one fixed for a spare. But if the old pump's no good in chorine, I cant do that. Any advice would be appreciated. Thanks for reading...

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Re: Salt-Water Pump question

Postby Denniswiseman » Wed 18 Mar, 2020 04:00

Salt water is more corrosive than fresh water but if you are adding liquid chlorine (sodium hypochlorite, plain bleach) then you are adding salt
If you are using Trichlor or Dichlor then you are adding Cyanuric acid
For every 10 ppm Free Chlorine (FC) added by Trichlor, it also increases Cyanuric Acid (CYA) by 6 ppm.
For every 10 ppm FC added by Dichlor, it also increases CYA by 9 ppm.
For every 10 ppm FC added by Cal-Hypo, it also increases Calcium Hardness (CH) by at least 7 ppm

I wouldn't concern yourself as there are millions of pool owners using SWCG (salt water chlorine generators) and liquid chlorine with no problems

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