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Thread: pressure booster systems

  1. #16

    Default Still another question

    What do you mean by tricked up a bit to work well?

  2. #17
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    We change the nozzle to a smaller one to help it make more pressure to operate the CSV.

    bob...

  3. #18

    Default Just about ready to buy

    Okay. First choice, purchase a Gould JS10 jet pump and change the jet on this to a high pressure type, don't know if jet change is easy,a 2 gallon bladder tank, a pressure switch and your adjustable CSV. This pump also comes with an attached pressure switch. I think that I read here on this sight that the preesure switch should be mounted even closer to the tank instead of on the motor.

    Or,purchase a Franklin FVJ1Cl jet pump. Both pumps are 1 hp,115volts. This pump comes with interchangable jets. Sounds as if it is very easy to change pump jet.Both pumps cost nearly the same.

    My water supply comes from the roof of 2nd story, some pressure. If the water comes from the roof, doesn't this mean that I do not need a check valve?

    Is the 2 gallon bladder too small, if so, then what size?

    Would a jet pump and flow switch work instead of the system above? If a flow switch turns on the pump when a faucet is opened and off when closed, then, why will this set up not work?Again,the water suppy will be coming from the roof.

    If I need a tank, is it okay to empty all the air out of the tank so it will be allowed to travel on the airplane (no pressurize containers allowed ). I need to take this system to Mexico. Thank for helping. Joe

  4. #19
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    That's a lot of questions in one post so I'll do it this way.

    Okay. First choice, purchase a Gould JS10 jet pump and change the jet on this to a high pressure type, don't know if jet change is easy, It's not the jet you want to change, it's the venturi a 2 gallon bladder tank, a pressure switch and your adjustable CSV. This pump also comes with an attached pressure switch. I think that I read here on this sight that the preesure switch should be mounted even closer to the tank instead of on the motor. The switch should be close to the tank. But 5 feet or so is not a problem.

    Or,purchase a Franklin FVJ1Cl jet pump. Both pumps are 1 hp,115volts. This pump comes with interchangable jets. Sounds as if it is very easy to change pump jet.Both pumps cost nearly the same.
    Why don't you consider one of my pumps, they are probably less money and I can make the change for you. Jet Pumps

    My water supply comes from the roof of 2nd story, some pressure. If the water comes from the roof, doesn't this mean that I do not need a check valve? You need a check valve with a tank and switch.

    Is the 2 gallon bladder too small, if so, then what size? No it's not too small, but I like the 42 gallon better. The WWT20 is the one I recommend Bladder Tank

    Would a jet pump and flow switch work instead of the system above? If a flow switch turns on the pump when a faucet is opened and off when closed, then, why will this set up not work?Again,the water suppy will be coming from the roof. Forget about the roof, it's not important to your setup and it makes no difference except that you will have a flooded suction for the pump. A Flow Switch will work except that; like you said, everytime you open a faucet the pump will cycle. This is not a good thing for the motor.

    If I need a tank, is it okay to empty all the air out of the tank so it will be allowed to travel on the airplane (no pressurize containers allowed ). I need to take this system to Mexico. Thank for helping. Joe Sure, as long as you put it back to it's correct pressure when you get to Mexico. You can use Mexican air, it will work just fine.

    bob...
    Last edited by speedbump; 10-06-2008 at 06:06 AM.

  5. #20

    Default question

    As the nozzle is changed to smaller size, to increase the water pressure, I have read that the flow will change down to much less gpm. And since I have 3 bathrooms with all being used at the same time when we are on vacation, washer and sinks also, will I need a larger pump or a multi stage pump to make up the difference of lost pressure by going to a smaller nozzle? I have maybe 15psi from the roof top water supply. Two story roof.

    I still do not want any electronic controller box. I do want to use your adjustible CSV. I'm just trying to cover all the bases because, when I go to Mexico with this set up, I may not be able to get the parts that I need to get it up and running correctly. Thanks. Joe Talla

  6. #21

    Default

    I thought that I would get your answer sent to my regular email, sorry about that. I also asked a couple questions on your site again. I would prefer any set up that is better than the AIO unit that I have now, (broken unit). I like the option, that if I install in the cistern, there will be no sound. By the way, the cistern is about 5 feet from the old broken system. Thanks Joe Talla

  7. #22
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    There will be no electronics with this setup. Just plain old mechanical/electrical devices.

    bob...

  8. #23

    Default Mq3-45

    Grundfos pumps come with a 2-year warranty. Grundfos has a distributor and dealers in Mexico. If you bought your pump in the USA and brought it into Mexico, there will be no warranty, unless you did a proper importation. I am a dealer in Baja and I sell hundreds of these pumps with few problems. When there is a problem, I give my customers a free "loaner" pump to use while I repair their pump. If you live in a humid area of Mexico (it's a big country), there could be problems with condensation in the electronic control box. That has been corrected in their new pumps. There is most certainly a seal on the cover of the electronics compartment. List price on the circuit board is around $260 USD. Who told you it was no good? Was it tested??
    If you go with a pressure tank, plan on replacing it every two years or so, and if your water source is not disinfected (chlorine), the bladder will become a bacteria heaven. If you have hard water (over 7 grains), you will need a water softening device or de-scaler before your UV lamp. Read your instructions/specs.
    Mexico is a different animal, so you need to ask the right questions. I'd be happy to help you.

  9. #24
    Moderator valveman's Avatar
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    Welcome to the forum. We learn a lot from each other here.

    The MQ pump has a small bladder pressure tank under the housing. This bladder tank is just as susceptible to contamination as any other.

    Replacing bladder tanks every couple of years tells me that the pump system is cycling on and off constantly. Eliminate the cycling with a CSV, and bladders tanks will last a long time.

    I guess it is possible to seal well enough to prevent condensation in the electronics but, it would have to be air tight. Then how do you keep it cool?

    What is the average life expectancy of the MQ units that you see, before someone gets to use a loaner pump?

  10. #25
    Porky Cutter,MGWC Porky's Avatar
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    Default Most USA people don't understand your system!

    I've been to Mexico and I believe I understand your system.

    The roof rainwater drains into a cistern, then a pump in the cistern pumps water to an unpressurized storage tank on the roof, then the unpressurized storage tank on the roof provides supply water to a pressure supply pump; tank and pressure switch too supply the home!

    The solution to your problem is not as difficult as it appears. I suggest that you look up www.cyclestopvalves.com and call their toll free number. The people there will walk you through what you need to do at no cost to you. You will only need a jet pump, a small tank and a cycle stop valve! I'm sure that CSV will make recommendations on how to repair your existing pump (even though they don't sell pumps) at minimum cost. Tell them Porky sent you!

  11. #26

    Default it worked

    Thank for all your help. I had a little problem with the electric part of install but, cleared that up with a live chat at CSV web site. We are back to heated water with good pressure and using 1 less pump. I still need to hook up the safety off pump controller. I will do that on our next vacation. Thanks again. Take care. Joseph Talla

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