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I was going to post in "swim spas" but was worried I wouldn't get the benefit of all your hot tub expertise..!! 1. Background I've had my "Endless Pool" for 12 years. I am on my 4th circulation pump. It was shipped with a Laing E14 low power pump, running 24/7 (controlled by a Gecko in.xe). There is only 6 feet of plumbing so seemed fine. The E14 pumps seem to last about 3 years between failure. The failures seems quite consistent - a grinding noise when starting and then refusal to run. Sounds quite similar to https://www.poolspaforum.com/forum/index.php?/topic/48883-master-spas-multiple-circuit-pump-failures/ 2. Heat Pump Anyways.. I've recently added an air source heat pump (Gecko in.temp & in.ye) and another 20 feet of plumbing. My 3rd E14 failed soon after. Possibly related to the extra load.. or maybe it had just done it's 3 years of 24/7 service. So for my 4th pump I've gone for a simpler, cheaper, more powerful traditional pump (250 watts compared to the E14's 108 watts) https://www.poolandspacentre.co.uk/products/wtc50m-circulation-pump.html Questions Q1. What contributes to the lifespan of a pump? Is it total run time, or does starting / stopping the pump add extra trauma to the pump? I expect chemistry plays a part. I keep a reasonable ph level but I am far from obsessive about chemistry, so I expect my pumps could suffer a bit. Q2. I am thinking the OEM 24/7 circulation pump cycle was possibly a bit overkill and I am OK to reduce this significantly. The new pump can move 240 litres/min. And my pool is only used for 1hr 3x per week. In theory the new pump can circulate the full pool every hour. So how about activating the pump for 1 hr evening, 1 hr morning? Is that enough? And is 2 x 1hr causing twice as much cycling trauma on the pump than 1 x 2hr? (The 2 hrs circulation would be in addition to the circulation that takes place whilst heating. I activate the heating for a couple of hours before my swims to boost up the temp to around 23 celcius. Then turn off heating until the next swim day)

Thanks a lot guys. That's really useful. 1kw sounds anecdotally to be correct. Now I need to compare that against somebody else's pool! Is there a way of comparing one pool against another? E.g. Is there a heat loss unit of measurement such as "kw per litre per degree above ambient"? Ie the energy it takes to increase the temperature of 1 litre of water by 1 degree celcius above the ambient temperature. It would be really handy to know what is a good heat loss value.

Hi I've done a heat loss experiment today and was hoping somebody clever could tell me what it means. I've got a 10,000 litre pool, 7 feet x 14 feet. It's a heated outdoor pool in north west England, so it has a "hot tub" style insulated cover. It has 100mm rigid insulation on its walls. 1. My pool is normally heated to 23 degrees celcius 2. I switched off my pool heater yesterday 3. The pool temperature dropped by 2 degrees celcius in 24 hours (cover was not opened) 4. The ambient air temperature was between -2 and 2 degrees celcius over the 24 hours (i.e. around freezing) Is this a low/normal/high heat loss? Thanks!

I seem to be using around 25KWh per day to heat my pool. Based on the figures below, do you think that's good or bad..? It's a small outdoor exercise pool with a swim-current, that I use all year. Construction: partially in-ground, steel shell, vinyl liner Dimensions 14' x 7' x 4' Wall insulation: Insulated on 4 walls with 100mm rigid foam Cover: 60mm rigid foam cover (hot-tub-style) Base: 8mm foam underlay on concrete base Heating: 4KW electric heater Pool temp: 23 deg c Average air temperature in Manchester, UK over the year: 10 deg c Any thoughts?

Hi I'm building an above-ground training pool approx 17ft x 9ft x4ft using the "endless pool" kit (vinyl liner in a stainless shell). I'm in Northern England and want to use the pool all year round. So I need to understand about heat loss and insulation! 1. Firstly, will I get much better surface insulation if I get a hot-tub style cover? I can order what is effectively 2 regular hot-tub covers side-by-side to cover the pool. Will this give me a significant reduction in heat-loss over the winter, compared to a regular retractable cover? I can deal with the hassle is it's a big saving. 2. Also should I be insulating the sides of the pool (between the stainless shell and the wood cladding). I have seen some bespoke pool insulation boards on various websites. Is this worthwhile for my small pool? 3. Is it worth insulating between the pool and the concrete slab? Thanks for your help

Hi Anybody have this unit or know where i can find an independent review? I would like to know about the swim quality and if it if ok for 6'1" swimmers. Thanks