Thread: What pump do I need.

Hell I don't know, I have a fair sized Marquette centrifugal and it ain't bolted down, where the hell it gonna go.
But I will leave it up to DTW as he seems to be much more knowledgeable than me on this stuff.

I just had a look at mine, it's a Mitsubishi 250w. It's got a pressure switch that comes on at 18 kg/cm2 and off at 28 kg/cm2 or something like that (maybe someone clever can explain). Although I would say it's fine for a 2 storey family house I think we could do with a little bit more power for upstairs showers. It is bolted to the floor.

Originally Posted by blackgang

Originally Posted by MeMock

What sized tank would I need to you think to have enough water if the supply was cut for say 3 days?

Good idea, but as to tank size would depend on what your family use a day, we use 50 Gallons a day and my water tankage is set up to last 6 months at that usage, but we collect rain watetr and have no well.
So figure what you use, what you will require and then buy the tank, a Thai water jar is normally 1400 liters capacity, I have 21 of those in my system.

I have a similar system to you as the village water usually stops around now every year and comes back after Songkran. Rumour has it that there is now a borehile for the moo baan but I will believe that when the water keeps flowing.
In the dry season I use a petrol water pump to pump 80 metres from the klong, 30 metres under the road, acrros the front of my neighbours land, across his drive via a buried pipe, about 75 meters up our land ten another 75 across it. Nearly 350 meters all told and while the petrol pump has a good head by the time it gets to the tanks I can almost piss faster.
I have an extended family varying between me, wife and 3 1/2 year old son, my mother in law, friend and her 6 year old daughter, 2 or 3 people who work for us and whoever is visiting at the time.
We have an automatic washing machine that is on the go 4 times a week plus everyone showers at least daily.We generally use around 60 cu/m a month and last months waterbill was a whopping 123 baht.
To the op, if you are fitting a pump you really should put a tank between the supply and the pump and if you wish you could put a good filter after the pump.
I use a Mitsubishi 305 pump as I found that the 255 pump wasn't quite up to pumping water to 3 houses at the same time. It cost me 5,600 baht in Homeworks in Bangkok. The 25 and 30 merely refer to a 250 or 300 watt motor. The input and output pipes are 1 inch so you can use a 1 inch to whatever adapter to match your input and output pipes.
If you need more information or think I can help please contact me.

Originally Posted by Thetyim

I think you will find that is 1.8 and 2.8 kg/cm. 400 psi sounds a bit high to me

Yes, probably.

Originally Posted by blackgang

Hell I don't know, I have a fair sized Marquette centrifugal and it ain't bolted down, where the hell it gonna go.
But I will leave it up to DTW as he seems to be much more knowledgeable than me on this stuff.

BG I respect your knowledge on dredges and the like and would sit and listen with open ears because I have the experience enough to know that with all of the different types and applications of pumps even with the principal operation being the same they are for different purposes.

Your experience on such equipment trumps mine by leaps and bounds and I would not presume for a moment to question your knowledge, but rather ask questions for my own edification and self knowledge..

So, there's no ego struggle here nor are you suggesting there is. I just want to give him the best possible advice and not turn this into another one of those worthless, find out nothing threads because of all of the cooks and opinions and if it was going to go that way I was just going to be a spectator is all..

I learned my lesson in the Civic thread about trying to give worth while advice to people who don't really want it, as did you probably.. I'm of the mind that if someone else wants to treat their equipment with so much abuse and neglect and continue to be ignorant and argumentative about it, it's theirs to do so, I'd just never buy anything from them that's for sure.

What amazes me most though is how many people follow such advice like rats over the cliff when some people chime in with bad advice, just because they think they may know them better...

Originally Posted by NickA

I just had a look at mine, it's a Mitsubishi 250w. It's got a pressure switch that comes on at 18 kg/cm2 and off at 28 kg/cm2 or something like that (maybe someone clever can explain). Although I would say it's fine for a 2 storey family house I think we could do with a little bit more power for upstairs showers. It is bolted to the floor.

Yeah....See Nick this what I am trying to avoid with his house. If your pump was actually on the second floor closest to the bathrooms and even with the possibility of another pump downstairs as a booster you would have excellent, consistent pressure. By the time it fights the pressure to pump upstairs and travels through such small pipes getting there with the pump pressure drop off it is nothing by the time it comes out your shower head. If the houses here started out with at minimum 1 1/4" piping from the street to the house and then stepped down to 1" in the house and down to 3/4" to the various fixtures then these issue wouldn't be so prominent.

But since they don't the next best thing ideally is a system that has a booster pump downstairs (on 2 story houses) that draws from a tank full time in cases where you have intermittent water supply with that tank being automatically replenished constantly by the local water supply. A simple ball cock valve like in your toilet would serve that function but there are more expensive and sophisticated systems but not necessarily more effective.. That should pump to a smaller catch tank on the second floor for that pump to draw from that way there is no concern for a pump loosing prime except for unavoidable mechanical failures..

Ideally this would prevent the water in the tank from getting stagnant, stale and bacterially harmful as so many here do in by providing it with continually fresh chlorinated water from the public water system where that applies.

If there is no treated water coming in then that too should be addressed with a chemical feeder or some other process of sanitation in the lower tank though I don't really recommend too many other types for effective affordable sanitation..

From there if you so choose a filter could then be added, preferably depending on how clean you want your water or how much treatment it gets prior to your house a fibre filter plus charcoal is optimal.

The charcoal should be installed downstairs after the booster pump to prevent a total blockage of upward pumping and reduce flow restriction then the fibre filter upstairs after the pressure pump prior to the house so it catches any additional debris that might enter the system from there. That is an ideal system for the price, there are others but more complicated and less complicated more expensive and less expensive.

For his system he could just put in the upstairs pump if he so chooses but it will leave a lot to be desired he may just end up doing later anyway, like yours is now requiring..

On the issue of tank size... What is determining your size? budget, space, need? Easy answer... Buy the largest one you can afford to install and have room for...No harm in getting one that's too big within reason, only an issue if it's too small, but that should only be determined by your budget and your available space.. And then you work with that when it comes time to ration..

Hope that doesn't make your head spin too much..

Originally Posted by Marmite the Dog

In Thailand, you really, really need a tank with the pump between it and the house, and let gravity fill the tank.

If you pump direct from the mains you are likely to pull in loads of shit from the poor joints and broken pipes. If you use the pressure that is already there, the shit is pushed out of the pipe. Obviously, the water supply is still only good enough for showering, but you don't want to be showering in brown water that stinks of shit.

Agreed...See post above..Actually that's one thing I forgot to mention that the tank acts as a separation tank and aids in settling out the crap that comes in, even in public water. I am constantly cleaning out small shells and garbage out of my faucets and various small screen filters on all of my fixtures and appliances from my "filtered public water" system here all the time..

Originally Posted by Driventowin

Agreed

Fuck me! I just fell off my chair!

Now I'm confused. Does that mean I'm right or wrong about this?

Originally Posted by Marmite the Dog

Originally Posted by Driventowin

Agreed

Fuck me! I just fell off my chair!

Now I'm confused. Does that mean I'm right or wrong about this?

Arse!!... Stop drinking then!!! Now your in the shit...I'll never tell!!! I think your wrong to think your right...

Actually before the Civic thread got out of hand I was going to mind fcuk with you there too, but that got all foked up...

Originally Posted by Driventowin

Actually before the Civic thread got out of hand I was going to mind fcuk with you there too

It wouldn't have worked - I got the figures from Honda proving you were talking out of your arse, but I decided to leave it.

Originally Posted by MeMock

I was going to but only because I thought I needed one. After talking with my Dad I don't think I really need it as the water supply is quite reliable.

Do I need one?

hi public water cost monney if u have a tank u dont have to pay for water in the rainy season and u economice whith the cumunity water reserwes

Originally Posted by Marmite the Dog

In Thailand, you really, really need a tank with the pump between it and the house, and let gravity fill the tank.

If you pump direct from the mains you are likely to pull in loads of shit from the poor joints and broken pipes. If you use the pressure that is already there, the shit is pushed out of the pipe. Obviously, the water supply is still only good enough for showering, but you don't want to be showering in brown water that stinks of shit.

hear hear thats what the tank is for

This has all been really good information, thank you.

I have to go out for most of the day but will re read it when I get home.

Originally Posted by Marmite the Dog

Originally Posted by Driventowin

Actually before the Civic thread got out of hand I was going to mind fcuk with you there too

It wouldn't have worked - I got the figures from Honda proving you were talking out of your arse, but I decided to leave it.

Liar...Those numbers aren't public knowledge unless you have a backdoor source within Honda..The ones you get on the common sites and public information are always general and simplistic for the average consumer....Good try on the bluff though...