Hitachi water pump - help please

FarangRed · 30-05-2010, 05:48 AM

Originally Posted by RamboII

Is there a water pump sold in Thailand that is demonstratively better than the rest, as far as reliability? I need to replace the pump running my underground lawn sprinklers (4 zones with 4 sprinkler heads on each zone) and eventually the pump for my house (3 bathrooms and two kitchens). From what I've read, hitachi and Grundfos are both good pumps, with Grundfos being more reliable and more expensive. I need reliable because I am away from Thailand most of the time and need my grounds watered regularly.

I have 2 Grundfos on my sprikler system they have been there for 5 years now and turn on twice a day, no problem so far

**benbaaa** · 31-05-2010, 09:22 AM

Well, I did Thetty's thing - back on page 1 before the thread hijack

- I found a panel labelled out at 90 degrees to the water inlet and took it off, drained the water (having previously cut off the power, turned on a tap and turned off the supply from the tank first). Then I reversed everything and the pump started up. It was fine for a day, but now I still get this kind of sputtering noise when it's working, like there's air where it shouldn't be inside the pump. The pump's only coming on when it should, but it doesn't sound right. It used to be a quiet, high-pitched whine. Now it's the whine plus sputtering.

**Marmite the Dog** · 31-05-2010, 09:43 AM

^ Maybe got a leak and the air is exiting its reservoir? Get the bloke in the shop to take a look before you do a Butterfly on it.

**VocalNeal** · 31-05-2010, 09:44 AM

When you run the water in the house out of the tap/faucet do you get 100% water or do you get any air sputtering.

**benbaaa** · 31-05-2010, 11:43 AM

^ Just water, as normal. No sputtering.

FarangRed · 31-05-2010, 11:47 AM

Have you not fixed that fuking pump yet?

**benbaaa** · 31-05-2010, 12:09 PM

Several times.

**VocalNeal** · 31-05-2010, 12:15 PM

My original thought was that you were getting air sucked in on the suction side but waited until you had done the Thetty fix.

If there is no sputtering when the water is running then the system is full of water. Is the tank below ground or can you check if the water free flows from the tank?

I wouldn't worry too much about the sputtering noise. Unless it interferes with daily life.

First question for trouble shooting is " What has changed?" Only you can answer that.

**Thetyim** · 31-05-2010, 12:17 PM

Originally Posted by benbaaa

It was fine for a day, but now I still get this kind of sputtering noise when it's working

That would suggest that we are in the right area (amount of air in the reservoir)
Need to now find out why the reservoir is losing/gaining air.

Top left of your picture shows three screws.
In there is a diaphragm that controls the pressure going to the pressure switch.
This sometimes gets dirt in it.
Problem is the housing is plastic so retightening the screws correctly is critical and the black plastic tube must remain airtight.
If you ain't confident then get a thai expert to look at it and he will fuck it up for you.

**benbaaa** · 31-05-2010, 12:27 PM

Originally Posted by Thetyim

If you ain't confident then get a thai expert to look at it and he will fuck it up for you.

I got as far as the word expert and thought to myself fer fok's sake Thetty, you've lost it. But then I read the rest of the sentence.

**VocalNeal** · 31-05-2010, 12:47 PM

I have had a Sanyo pump in Indo. and now a Mitsubishi. I cannot find anything in the way of instruction or fault finding.

One thing I did find was on Yahoo answers they speculate on a vortex in the water tank.

It may be worth turning on a couple of taps in the house then looking inside the water tank while the pump is running to see if this is the case. An outside chance as it was not happening before but.....

I trust you have a sufficient quantity or beer while attempting all this work.

**benbaaa** · 31-05-2010, 01:23 PM

Originally Posted by VocalNeal

It may be worth turning on a couple of taps in the house then looking inside the water tank while the pump is running to see if this is the case. An outside chance as it was not happening before but.....

Nothing to see inside the tank when the taps are on. Just slowly decreasing water level.

My beer-drinking days are long gone.

**Butterfly** · 31-05-2010, 01:50 PM

^ why aren't you calling the installer ? or the shop you bought it from ? something is obviously broken, I am sure it can be fixed for less than 1000 THB

FarangRed · 31-05-2010, 03:17 PM

Get the Thai expert in be done in 2 minutes

**Marmite the Dog** · 31-05-2010, 03:21 PM

Originally Posted by benbaaa

My beer-drinking days are long gone.

Really? You're going to be a bundle of laughs at the weekend, then.

FarangRed · 31-05-2010, 07:55 PM

Have you still got the box that the pump came in?

**benbaaa** · 01-06-2010, 10:55 AM

Originally Posted by Marmite the Dog

Originally Posted by benbaaa

My beer-drinking days are long gone.

Really? You're going to be a bundle of laughs at the weekend, then.

Yes.

Originally Posted by FarangRed

Have you still got the box that the pump came in?

No.

**lom** · 01-06-2010, 11:04 AM

Originally Posted by Butterfly

^ why aren't you calling the installer ? or the shop you bought it from ? something is obviously broken, I am sure it can be fixed for less than 1000 THB

Isn't that the advice you are usually given by others here?

**Butterfly** · 01-06-2010, 11:07 AM

^ indeed, and I follow them

**Norton** · 01-06-2010, 11:13 AM

Originally Posted by Butterfly

indeed, and I follow them

We've had lots of "My water pump is broken" threads. Trying to fix a problem on a forum is near impossible. Way too many possible fixes on something that has all sorts of interdependent parts.

Unless it's something obvious, always better to have a fix it guy do the job.

If you don't, result will be getting an unwanted shower and a flooded house.

**benbaaa** · 01-06-2010, 11:20 AM

Originally Posted by Norton

better to have a fix it guy do the job.

We have had some bad experiences with fix it guys.

One guy couldn't be bothered to screw a set of hinges into the door frame - he used a fucking hammer to put the screws in.

Another guy blew himself off the ladder because he said he didn't need me to cut the power before he changed an electrical fitting.

Another guy had two new doors to fit to our bathrooms. One big door for the big doorway and one small door for the small doorway. I was at work, and Mrs bb wasn't paying attention. First thing he did was cut the big door to fit the small doorway. Then he complained that the small door was too small for the big doorway. We chucked him out without paying him.

**Norton** · 01-06-2010, 11:34 AM

Originally Posted by benbaaa

We have had some bad experiences with fix it guys.

Haven't we all. Contact Hitachi. They will steer you to a proper service guy.

Email - pip[at]has.hitachi.co.th

Phone - +66 (2) 632 9292

The pump may well be under warranty so might get lucky with little or no charge.

**Butterfly** · 01-06-2010, 11:36 AM

Originally Posted by benbaaa

We have had some bad experiences with fix it guys.

I know how you feel, but installers should be different ? or didn't they do a good job installing the pump ?

**benbaaa** · 01-06-2010, 11:42 AM

Originally Posted by Norton

Haven't we all. Contact Hitachi. They will steer you to a proper service guy. Email - pip[at]has.hitachi.co.th Phone - +66 (2) 632 9292 The pump may well be under warranty so might get lucky with little or no charge.

That's probably the way to go.

Originally Posted by Butterfly

I know how you feel, but installers should be different ? or didn't they do a good job installing the pump ?

The guy who did the big and small doors installed the pump.

**jandajoy** · 01-06-2010, 11:43 AM

Originally Posted by benbaaa

The guy who did the big and small doors installed the pump

Sorry mate but

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