Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 07-28-2013, 12:19 PM   #1
Member
 
Join Date: Feb 2008
Posts: 34
Share |
Default

Recommendation to pump water 35 ft too roof


Hi folks,

I have a solar water heater with a 40G tank on my roof. I want to pump water from the basement 35 ft up to the tank of the roof through 1/2 inch pex. The water in the basement is coming from a spare hot water holding tank not connected to the water supply. Time to move the water isn't important so whether it takes 1/2 hr or 2 hrs, that's fine.

Appreciate any ideas for an inexpensive pump for such a job.

atw58 is offline   Reply With Quote
Old 07-29-2013, 02:09 PM   #2
Mold!! Let's kill it!
 
Join Date: Feb 2008
Location: Central Pennsylvania
Posts: 2,833
Default

Recommendation to pump water 35 ft too roof


Are you pumping Potable water or is this a closed loop to heat an exchanger? A circulator pump like that used on a hot water heating system might work as long as the system is a pressurized closed loop. The kind of pump largely depends on the configuration of the system. You'll want a low volume pump so the the water has dwell time within the panel to absorb heat.
If it's an open system, you'll need a pump with enough head to lift the water to the top of the panel. I'm not sure I helped you, but you'll need to provide more info to get a clear answer.

Maintenance 6 is offline   Reply With Quote
Old 07-29-2013, 02:18 PM   #3
JOATMON
 
ddawg16's Avatar
 
Join Date: Aug 2011
Location: S. California
Posts: 6,836
Default

Recommendation to pump water 35 ft too roof


35' Of head is about 15 PSI. As noted by Maint....you want low flow....

But....if it's a closed loop system then the head is not really an issue since the water coming down will compensate....

Do a search on hot water recirc pumps....you don't need much.
__________________
"The dream is free but the hustle is sold separately."

My 2-Story Addition Build in Progress Link ... My Garage Build Link and My Jeep Build Link
ddawg16 is online now   Reply With Quote
Old 07-29-2013, 03:11 PM   #4
Retired from the grind
 
gregzoll's Avatar
 
Join Date: Dec 2006
Location: Midwest - Central Illinois
Posts: 13,880
Default

Recommendation to pump water 35 ft too roof


My guess is that you will need larger piping than the 1/2" Pex. I would personally go with no less than 1", so that the pump is not working as hard.

What pump do you plan on using?
__________________
Ren: Now listen, Cadet. I've got a job for you. See this button? Ren: Don't touch it! It's the History Eraser button, you fool! Stimpy: So what'll happen? Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?
gregzoll is offline   Reply With Quote
Old 07-29-2013, 06:13 PM   #5
Member
 
Join Date: Feb 2008
Posts: 34
Default

Recommendation to pump water 35 ft too roof


My system is currently closed loop but using water to transfer heat. The solar water heater is non-pressurized so it cannot supply the house directly. A holding tank in the basement is pressurized and feeds the hot water supply. Heat is transferred by circulating water between the roof tank and a basement holding tank using a small dc pump after I manually turn off city water to the holding tank. When the holding tank is hot then I turn off the cycling pump and restore city water.

To reduce heat lost by recycling, I want to dump the hot roof water into an empty 2nd tank in the basement. Then pump the 1st holding tankís water to the roof to capture heat again. Iíll alternate between the 2 tanks in the basement. One basement tank will be empty and the other full of hot water. This is where I need an open loop pump to fill the empty roof tank.

I tried with a jet pump but the pressure kept jumping high to low and caused the relay to chatter probably due to the small diameter half inch pex being driven.
atw58 is offline   Reply With Quote
Old 07-29-2013, 08:26 PM   #6
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 24,538
Default

Recommendation to pump water 35 ft too roof


Little Giant 360K pump. good for over 40 foot of head. not sure what GPM you'll gt though.
__________________
When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions.
beenthere is offline   Reply With Quote
Old 07-29-2013, 08:27 PM   #7
Member
 
Join Date: Sep 2012
Posts: 1,696
Default

Recommendation to pump water 35 ft too roof


Is there a reason you don't just plumb the solar heater system to pre- heat your normal water heater?
If I'm reading the description right you are going to be a very busy man with what you are proposing, and switching from municipal water to open tank may not be such a good idea.
Fairview is offline   Reply With Quote
Old 07-29-2013, 08:47 PM   #8
Member
 
Join Date: Feb 2008
Posts: 34
Default

Recommendation to pump water 35 ft too roof


Yes, I have been going to the basement daily to recycle for an hour then switch back. The reason the solar tank can't preheat into the regular water tank is because it is non-pressurized. The seals around the glass tubes can't take municipal water pressure. There is a different type of solar heater that you feed city water in and hot water comes out which can feed the house or preheat a regular tank.
atw58 is offline   Reply With Quote
Old 07-30-2013, 03:37 PM   #9
Member
 
Oso954's Avatar
 
Join Date: Jun 2012
Location: Northern Calif.
Posts: 1,407
Default

Recommendation to pump water 35 ft too roof


The Little Giant 360 series pumps are listed as intermittent duty (15 minutes on, 45 minutes off).
Oso954 is offline   Reply With Quote
Old 08-15-2013, 09:44 PM   #10
Newbie
 
Join Date: Dec 2008
Posts: 4
Default

Recommendation to pump water 35 ft too roof


What about using the air lift method or Geyser Pump since your not concerned with speed?
DIY4WIFE is offline   Reply With Quote
Old 08-16-2013, 09:32 AM   #11
Newbie
 
Join Date: Aug 2013
Posts: 19
Default

Recommendation to pump water 35 ft too roof


You don't want the PEX exposed on the roof. Sunlight is bad for it.
ask tom is offline   Reply With Quote
Old 08-16-2013, 10:00 AM   #12
Retired from the grind
 
gregzoll's Avatar
 
Join Date: Dec 2006
Location: Midwest - Central Illinois
Posts: 13,880
Default

Recommendation to pump water 35 ft too roof


Quote:
Originally Posted by ask tom View Post
You don't want the PEX exposed on the roof. Sunlight is bad for it.
You do realize that there are different grades of PEX. BTW, this is a old thread, that has ran its course. Thank you for finding it in your search on a search engine, but the OP has figured this out.
__________________
Ren: Now listen, Cadet. I've got a job for you. See this button? Ren: Don't touch it! It's the History Eraser button, you fool! Stimpy: So what'll happen? Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?
gregzoll is offline   Reply With Quote
Old 08-17-2013, 12:07 AM   #13
Member
 
Join Date: Feb 2008
Posts: 34
Default

Recommendation to pump water 35 ft too roof


Since we get snow in the winter, the hot and cold pex runs along heater cord used to melt snow from roofs. Then 2 layers of foam pipe insulation surround the pex/cord sandwich. Pex is inside 4 inch ducting goes from the roof to the tank so it is never exposed to sunlight.
atw58 is offline   Reply With Quote
Old 08-17-2013, 06:24 AM   #14
Newbie
 
Join Date: Aug 2013
Posts: 8
Default

Recommendation to pump water 35 ft too roof


Quote:
Originally Posted by DIY4WIFE View Post
What about using the air lift method or Geyser Pump since your not concerned with speed?
I agree with DIY4WIFE air lifts are incredibly efficient, non complex and you can move volumes of water over long distances in an open system.

Neosastan is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Protecting patio roof from water comming from house roof alekas Roofing/Siding 2 07-30-2013 09:40 AM
Chasing Ghosts - Phantom Water Leak FrozenMeatballs Plumbing 3 02-17-2013 11:24 AM
Yet another sump pump / pit question SeanFlynn Plumbing 0 01-24-2010 01:07 PM
Water Stinks with recirculation pump carike Plumbing 6 08-05-2008 08:01 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.