Re: jet pump alternative

Depends on how high/far your will pump the water? Are you using a pressure tank?

Re: jet pump alternative

Depends on how high/far your will pump the water? Are you using a pressure tank?

yes sir, from a ground tank to the pressure tank via a jet pump, hanggang 2nd floor lang sir, hindi kasi kaya ng pressure ng local water district yung itaas, sa gabi lang maganda ang pressure dun pero any time of the day wala na, tulo na lang

Re: jet pump alternative

What size is your pressure tank? How long does the pressure tank takes to fill up?

Re: jet pump alternative

pipe diameter, total length of pipes, total lift, number of bends ang usually kelangan para maestimate yan....pero i guesstimate na yung regular 3/4 pump-motor & 40 psi pressure tank assembly is more than enough to provide your need.

Re: jet pump alternative

hello!

tanong ko lang po kung ano po ang pwedeng alternative sa residential water pumps na mga 1hp, ang lakas kasi sa kuryente e. ito po kasi ang setup namin:

ang water supply po namin ay galing sa local water district, tapos naglagay kami ng water tank (ground) kasi hindi po kasi consistent ang water pressure, from that water tank papunta sa pressure tank via jet pump.

is there any other way para ma lessen ko yung power consumption ng jet pump? i was thinking masyadong malaki for our requirement yung jet pump na 1hp considering hihigupin nyang tubig e galing din sa water tank at hindi sa deep well? i know na ang ultimate solution ay overhead tank kaya lang wala pa akong budget kaya pansamantala nag iisip ako kung paano ma lessen yung power consumption nya.

thank you in advance sa inputs nyo

* is there a dc pump that can provide around 30-35psi of water pressure? para maalis ko na yung pressure tank+jet pump, parang on-demand, pag <30psi yung pressure the pump will kick in??

IMHO:

using a lower HP motor will not reduce your power consumption. If 1HP works 30 minutes to do the job, a 1/2 HP motor will require 1 hour of operation. Same banana.

Re your second question, you might want to try:

Local water -> check valve->tank1(cistern) ->pump ->main tank

you need 2 pressure switches, 1 at tank 1 and the other the way it is now.

calibrate your pressure switch on tank 1 to trigger only when when local water pressure is below 30PSI.

They must be installed in "series" meaning both pressure switches must be in the "on" position for the pump to work.

Re: jet pump alternative

What size is your pressure tank? How long does the pressure tank takes to fill up?

pressure tank is 80 gallons and takes a little more than 5mins to fill, cut on/off at 20-40

pipe diameter, total length of pipes, total lift, number of bends ang usually kelangan para maestimate yan....pero i guesstimate na yung regular 3/4 pump-motor & 40 psi pressure tank assembly is more than enough to provide your need.

medyo mahirap ng makuha yang mga info na yan sir but thanks for the suggestion, presently we have the 1hp pump and 20-40psi cut off

IMHO:

using a lower HP motor will not reduce your power consumption. If 1HP works 30 minutes to do the job, a 1/2 HP motor will require 1 hour of operation. Same banana.

Re your second question, you might want to try:

Local water -> check valve->tank1(cistern) ->pump ->main tank

you need 2 pressure switches, 1 at tank 1 and the other the way it is now.

calibrate your pressure switch on tank 1 to trigger only when when local water pressure is below 30PSI.

They must be installed in "series" meaning both pressure switches must be in the "on" position for the pump to work.

napansin ko lang kasi sir, once a motor kicks in, ang laki ng startup power requirement nya then gradually bababa sa talagang power rating nya, but yes i agree different pump but same pressure tank would be the same

para saan po sir yung 2nd pressure switch? i mean yung pressure tank namin already has cutoff/on at 20-40, it operates sa ganyang psi

thank you all sa suggestions

Re: jet pump alternative

para saan po sir yung 2nd pressure switch? i mean yung pressure tank namin already has cutoff/on at 20-40, it operates sa ganyang psi
thank you all sa suggestions

The second switch serves as a sensor on the local water side.

If your present setup already detects the pressure of the local water, the second switch will not be necessary.

Part of your question "pag <30psi yung pressure the pump will kick in?? " led me to believe you are having difficulty detecting the local water pressure.

Good luck !

Re: jet pump alternative

The second switch serves as a sensor on the local water side.

If your present setup already detects the pressure of the local water, the second switch will not be necessary.

Part of your question "pag <30psi yung pressure the pump will kick in?? " led me to believe you are having difficulty detecting the local water pressure.

Good luck !

sir, pasensya na slow lang hehehe, since ordinary water tank lang yung una(cistern) definitely hindi ko masusukat ang pressure dun, pwede ba sa main line, sa mismong pipe ilagay yung gauge + pressure switch? at saka mag a-add po ba ako ng line, parallel dun sa setup na tank1+pump+pressuretank para pag 30^psi ang pressure e bypass nya yun?

senya na po, medyo hindi ko masyado naintindihan pero yung naka series yung pressure switch medyo gets ko hehehe

thanks

Re: jet pump alternative

Kung cistern, hindi mo na kailangan yun. Ang point lng kasi, kung malakas na pressure sa line, pwede na walang water pump. Since galing sa cistern, then automatic you need a pump.

For 2-story building, usually .5-.75hp will do, huwag lang madami sabay gagamit. Ang downside kasi ng bigger pumps is frequent startups, yun ang malakas sa kuryente.

Re: jet pump alternative

Kung cistern, hindi mo na kailangan yun. Ang point lng kasi, kung malakas na pressure sa line, pwede na walang water pump. Since galing sa cistern, then automatic you need a pump.

For 2-story building, usually .5-.75hp will do, huwag lang madami sabay gagamit. Ang downside kasi ng bigger pumps is frequent startups, yun ang malakas sa kuryente.

naisip ko nga sir na mag parallel ng line from main hanggang sa inlet ng buong bahay para sa time na mahina pressure bypass ko na yung cistern+pump+pressuretank kaya lang manual, turn off valve after ng pressure tank then turn on yung valve dun sa naka parallel na pipe, pwede kaya yun ma automate? hehehe

one question pala mga sir, pwede kayang maglagay ng mga 50gallon na tangke sa ibabaw mismo ng bathroom sa 2nd floor? dun sa ibabaw ng wall nya, sa corner, yun yung support nya, kayanin kaya ng wall yung bigat nun? yung shower lang ang susuplayan nya ng tubig....

Re: jet pump alternative

sir, pasensya na slow lang hehehe, since ordinary water tank lang yung una(cistern) definitely hindi ko masusukat ang pressure dun, pwede ba sa main line, sa mismong pipe ilagay yung gauge + pressure switch? at saka mag a-add po ba ako ng line, parallel dun sa setup na tank1+pump+pressuretank para pag 30^psi ang pressure e bypass nya yun?

senya na po, medyo hindi ko masyado naintindihan pero yung naka series yung pressure switch medyo gets ko hehehe

thanks

By the way allow me to mention some related things you might want to consider:
1. When anyone operates a "booster" pump or a pump connected directly to the public water supply, it lowers the pressure for other water subscribers. The way a cistern should work is have the local supply fill up a "swimming pool", not a tank. You then draw from that storage and provide your own pressure. This setup does not in any way decrease the pressure on the supply line. Eh sino ba naman ang sumusunod sa ganito? 🙂
2. Imagine this: May crack yung public water supply at nakalubog sya sa kanal. During good pressure, clean water goes out the pipe into the canal. When there is no pressure, your pump will provide a negative pressure and suck in dirty water from the kanal. Another advantage for the "swimming pool" solution - you only get water when there is pressure at the local supply.

Now back to your original concerns.

Presently, may oras ba na hindi umaandar yung jet pump at local water ang nagbibigay ng pressure?

If this is so, you don't have to change anything except the size of your pump regarding the power consumption.

On your question regarding the 50 gallon tank on top of the bathroom. Katumbas nya ang bigat ng mga 5 tao not considering the forces during eathquake. That is why they are usually on roof decks or on a dedicated steel tower.

Habang wala pang budget, pwede rin malaking orocan na nilagyan sa loob ng submersible pump. sindihan lang pag shower time na. I did this to draw warm water (solar heated) from a container located outside the bathroom in the garden.

Malaki ba ang lote or garahe nyo for other orocan "cisterns"?

Re: jet pump alternative

@ seymorebutts,
I made an illustration based on my understanding of your set-up

These are the advantages of the modified set-up I suggest.
1. You dont have to manually close / open the isolation valves
2. If you have enough line pressure from the water district (20 psi or more) it will flow up to your 2nd floor, your pump will not cut-in because the pressure is above the pressure switch cut-in setpoint
3. If there is line pressure from the water district but not enough to overcome the head going to the 2nd floor, it will supply the pump suction. The pump will run but the power consumption will be lesser because there is suction head (a little push will mean lesser work for the pump).
4. Your water tank located on the ground will always be full and ready to supply the pump
5. You can use a small pump/booster pump ( probably a 1/2 HP) provided the pump head is at least 60ft (20 m). I've been using a 1HP motor in our province to supply our water requirement at a higher elevation (around 40m or 130ft) the nameplate total head is 48m. I am getting a decent water pressure. In your case I would assume that it is more than your requirement, unless there are simultaneous multiple users. In which case the pipe sizing should be adequate for the demand.
If you are going to change your pump take a closer look at the total head at the nameplate to be sure you are getting the right one for your needs

I agree that frequent start/stop of the pump consumes more power because the starting current of motor is normally 3 to 4x the running current. This is what you will experience if you are using a bigger pump than you actually need. If you want to lessen the start /stop interval you need a bigger pressure tank so that the pressure decay during use will be slower, or just get at smaller pump.

The disadvantage..
Like what was previously mentioned there is a possibility that your pump will suct dirty water in case there is no supply from the water district and the pump keeps on running. It is a major health concern that needs attention. You can address that if you will modify your pump controls by putting low pressure switch on the supply line that will serve as an interlock to automatically stop your pump.

With regards to installing additional water tank at your 2nd floor, I would suggest you ask for the opinion of a technical guy who can assess the structural strength of your bldg before installing additional load. HTH

Re: jet pump alternative

wow! thank you very much for that diagram sir camv :foryou:

tama sir, yan yung existing setup ko but it supplies sa ground floor too.

tanong lang po regarding sa suggested setup nyo, yung na-encircle ko, pwede po bang wala na yan? as mentioned, baka nga madumi yung tubig na ma-suck nung pump kung i-rekta sa mainline.

regarding low pressure switch na ilalagay sa mainline, as what was suggested earlier also, pwede syang i-series dun sa switch na located sa pressure tank?

@sir vivafoxpro

it has always been this setup, from the pressure tank yung supply sa bahay

i will have to discard that small tank installation above the bathroom idea, sa komiks lang pala pwede yun, hehehe

re: orocan cisterns, pwede kaya i-diretso ko na lang sa water tank yan submersible pump sir instead of orocan para ma-eliminate ko na pressure tank+pump setup?

medyo malaki nga yung 1hp/80gal pump+pressuretank na kinabit for a 5 person household, i think yung reason kung bakit ganun ang kinabit nila was dahil at first e deep well ang supply.

maraming salamat po ulit

Re: jet pump alternative

You can remove the encircled isolation valve as well as the check valve nearest the supply line. By doing this your pump will only get its suction from the tank. Thats right, you eliminate the possibility of getting dirty water when there is no supply from water district. The option to use the pump as booster to boost the water district supply pressure will be eliminated also(#3 item on my previous post).
Dont bother to install the low pressure switch option with this set-up. However you may install a tank low level pump cut-off switch so stop the pump when the suction tank water level is low.