Pool evaporation, etc

pinkchilli


Joined: 30/11/2008
Posts: 689

Message Posted:
11/04/2009 08:38

Please share your situation:



1. How much water are you losing, per week?



2. How long is your pump on for?



3. What are the operating times for your pool pump?



4. What is your pool temperature?



5. What size is your pool?



6. (For the idiots) Have you been in yet?

pinkchilli


Joined: 30/11/2008
Posts: 689

Message Posted:
11/04/2009 08:42

Excellent post Pink Chilli. I was wondering exactly the same. Here are my answers!



1. How much water are you losing, per week? About THREE tons, that's why I asked.







2. How long is your pump on for? Four hours.







3. What are the operating times for your pool pump? 9am - 11am & 3pm - 5pm.







4. What is your pool temperature? 18 degrees on the 10th April.







5. What size is your pool? 5m x 10m.







6. (For the idiots) Have you been in yet? Yes, yesterday ;)

Sideways



Joined: 21/01/2009
Posts: 529

Message Posted:
11/04/2009 09:46

1. How much water are you losing, per week? Virtually nothing (solar cover stops evaporation)







2. How long is your pump on for? 2hrs







3. What are the operating times for your pool pump? 00.00-00.30, 06.00-06.30, 12.00-12.30, 18.00-18.30.







4. What is your pool temperature? 21 degrees @ 09.30 11th April (Solar Cover)







5. What size is your pool? 10m x 5m







6. (For the idiots) Have you been in yet? NO

bjrice


Joined: 08/04/2008
Posts: 53

Message Posted:
11/04/2009 10:10

hi sideways, would you recomend a solar cover and can you tell me what i might expect to pay for a cover for a 8x4 skimmer pool.

pinkchilli


Joined: 30/11/2008
Posts: 689

Message Posted:
11/04/2009 11:36

Sideways, same question for me, but 5 x 10.



Cheers



PS. where can they be bought?

stilluvithere



Joined: 03/12/2008
Posts: 765

Message Posted:
11/04/2009 13:51

can you use a pool cover on an overflow pool please

pjnxi



Joined: 12/02/2009
Posts: 167

Message Posted:
11/04/2009 14:09

Yes you can use solar cover on overflow pool . my blue solar cover on 8x4 pool £350. in march 2008

bjrice


Joined: 08/04/2008
Posts: 53

Message Posted:
11/04/2009 15:23

pinxi, did that price include a roller, or is there any other way of putting them on. also can you tell me where you bought it.

Sideways



Joined: 21/01/2009
Posts: 529

Message Posted:
11/04/2009 15:55

The company that I bought my cover from is not trading anymore.

They also sold heat pumps for pools.

I'm sorry I can't help but I thought someone should sell them here.



Pete.

MarkVPiazza


Joined: 14/08/2008
Posts: 530

Message Posted:
11/04/2009 16:29

Evaporation negligable



Pump on 2 hours per day 9-10, 4-5



21c



8x4



been in twice today



yes, we also have a solar cover brought over from the UK, cost £100



Mark

TRNCVaughan


Joined: 27/04/2008
Posts: 4578

Message Posted:
13/04/2009 09:27

Hi pinkchilli,



You have a bit of a leak there, I'm afraid.

Industry rule of thumb for evaporation is between 30% and 50% of the total contents of your pool will be lost to evaporation in a year. Do the sums:

Pool 10x5x1.5m = 75m3 or 75 tonnes, plus balance tank, 5 tonnes = 80 tonnes.

Evaporation, worse case, 50% = 40 tonnes in a year. Divide 40 by 52 and you get 0.77 tonnes per week. Allow double the rate in summer that you have in winter and at worst you shouldn't be losing more than 1.5 tonnes per week even in summer.

Don't worry, though. You aren't the only one.

hattikins


Joined: 17/02/2008
Posts: 2793

Message Posted:
13/04/2009 12:37

Hi Mark

Can you give me the name of the company please for the solar cover,



Hattikins

keithcaley



Joined: 13/06/2008
Posts: 2521

Message Posted:
13/04/2009 12:45

I spotted a californian website that suggested from 2 to 5cm loss per week in hot, windy weather...

TRNCVaughan


Joined: 27/04/2008
Posts: 4578

Message Posted:
13/04/2009 12:59

Hi Keith,



On a 10x5m pool 5cm equates to 2.5 tonnes. Given that this is maximum under hot and windy weather and Cyprus is hot but only windy in winter, it makes 3 tonnes per week (pinkchilli) over the max he should expect.

keithcaley



Joined: 13/06/2008
Posts: 2521

Message Posted:
13/04/2009 22:30

Hi Vaughan,

I wasn't arguing (you know me, I haven't got an arguementative bone in my body - MUCH!) - thought I'd just pass it on as a bit of 'additional information' - the numbers are all in the same ball park anyway, and pinkchilli's pool obviously bears more than a passing resemblance to a sieve...

If the leak is excessive, and leads to the surrounding ground becoming waterlogged, won't it create stresses that the pool was not designed (if it was 'designed'!) to cope with?

Keith.

TRNCVaughan


Joined: 27/04/2008
Posts: 4578

Message Posted:
14/04/2009 09:25

Hi Keith,



I didn't think for a mo that you were contradicting me, old bean.



Problems with leaky pools are:

1. They cost money to keep topping-up.

2. They introduce "new" water which keeps your pool out of balance.

3. They need more chemicals to keep them under control.

4. Because of the above they have a tendency to go green.

5. They can, as you rightly say, undermine even the best built pool, by washing away the supporting earth from underneath the pool.



The good news is, we do know what causes a lot of pools to leak and we do know how to repair them. In fact, it is the biggest part of our business at the moment.

MarkVPiazza


Joined: 14/08/2008
Posts: 530

Message Posted:
14/04/2009 11:13

Hattikins



http://www.poolstore.co.uk



Mark

mrjim



Joined: 26/04/2008
Posts: 78

Message Posted:
14/04/2009 12:31

when the pools are built do they come with a gurantee and what would this cover and length of gurantee

TRNCVaughan


Joined: 27/04/2008
Posts: 4578

Message Posted:
14/04/2009 12:42

Well, it depends who built the pool, but a lot of builders here sub the work out and if there is a claim against the pool can't get the subby to do anything about it, many having returned to chicken farming in Turkey.



However, reputable firms guarantee their work as follows:

Pool equipment - pumps etc, manufacturers warranty - usually 1 year.

Pool itself - 5 years against leakage and cracking. Earthquakes/tremors are an exclusion and the pool should be insured against this.

mrjim



Joined: 26/04/2008
Posts: 78

Message Posted:
14/04/2009 14:17

thanks very much for that information very helpful

Tootie


Joined: 28/08/2008
Posts: 2037

Message Posted:
14/04/2009 17:07

Vaughan,



Could you please tell me if the solar pool covers on the poolstore.co.uk website are any good?



Im thinking of buying on this week to be shipped out with my other stuff soon.





Also what are the advantage's?





thanks tootie

pilgrim



Joined: 11/05/2007
Posts: 1404

Message Posted:
14/04/2009 21:28

cyprus heat pumps at aljadqui ( turtle beach)reasonable for solar covers, contact John.

TRNCVaughan


Joined: 27/04/2008
Posts: 4578

Message Posted:
15/04/2009 08:57

Solar covers are a good idea. They heat the pool up (slightly) when the cover is on during the day, and retain the heat during the night.

They are easier to use on a skimmer pool than an overflow but it can be done.

I have recently spoken to John at CHP and he is almost out of covers/rollers.

MarkVPiazza


Joined: 14/08/2008
Posts: 530

Message Posted:
15/04/2009 11:30

Vaughan

They more than "slightly" heat the pool up during the day - when peeling off the cover last week the top 2 inches of water was at bath temperature



Temperature reading from 3 feet down was 22c on Sunday



Mark

TRNCVaughan


Joined: 27/04/2008
Posts: 4578

Message Posted:
15/04/2009 14:15

Hi Mark,



Of course as a cumulative thing they will heat your pool more than slightly, but I meant that on a daily basis the increase (per day) is only slight. i.e. from "cold" a covered pool needs a few days to increase by any reasonable amount. Most important is to keep the pool covered when not in use.