Go Back   Winnipesaukee Forum > Winnipesaukee Forums > Home, Cottage or Land Maintenance
Home Forums Gallery Blogs YouTube Channel Classifieds Links Calendar Register FAQDonate Members List Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
Old 08-15-2021, 06:56 AM   #1
TiltonBB
Senior Member
 
Join Date: Feb 2005
Location: Gilford, NH and Florida
Posts: 2,233
Thanks: 399
Thanked 1,682 Times in 676 Posts
Default Lake water systems

I was wondering what other people have experienced with this.

I have a good water system that pumps out of the lake all year long.

I decided to install a second, back up, seasonal system for irrigation, car washing, and to feed a second building on the property. They are plumbed so that if either fails I can just open a valve and the remaining one will feed everything.

The intake is about 40 feet from shore, about 2 feet above the lake bottom in about 6 feet of water It is a fairly busy area for boats. It seems to me that the filters get dirty and need to be changed pretty quickly. I am considering extending the intake to 60 feet out in about 10 -12 feet of water. Still 2 feet off the bottom? Maybe.

I am curious where most people pumping from the lake put their intakes or anything they may have learned with years of experience to get the best quality water. If I can't get this a lot better I may consider a well.
TiltonBB is offline   Reply With Quote
Old 08-15-2021, 07:21 AM   #2
CowTimes
Senior Member
 
Join Date: Jan 2019
Posts: 130
Thanks: 8
Thanked 121 Times in 63 Posts
Default

Quote:
Originally Posted by TiltonBB View Post
I was wondering what other people have experienced with this.

I have a good water system that pumps out of the lake all year long.

I decided to install a second, back up, seasonal system for irrigation, car washing, and to feed a second building on the property. They are plumbed so that if either fails I can just open a valve and the remaining one will feed everything.

The intake is about 40 feet from shore, about 2 feet above the lake bottom in about 6 feet of water It is a fairly busy area for boats. It seems to me that the filters get dirty and need to be changed pretty quickly. I am considering extending the intake to 60 feet out in about 10 -12 feet of water. Still 2 feet off the bottom? Maybe.

I am curious where most people pumping from the lake put their intakes or anything they may have learned with years of experience to get the best quality water. If I can't get this a lot better I may consider a well.
You will get much better water quality with drastically less sediment by moving the foot valve out as you suggest. We did the same thing a couple years ago in the same situation, from about 5 feet deep close to shore and moved it out about 75’ to around 12’ of water, and the difference was night and day for our filters.
CowTimes is offline   Reply With Quote
The Following 2 Users Say Thank You to CowTimes For This Useful Post:
ApS (08-15-2021), TiltonBB (08-15-2021)
Old 08-15-2021, 08:15 AM   #3
SAMIAM
Senior Member
 
Join Date: Apr 2004
Location: Moultonborough
Posts: 2,672
Thanks: 261
Thanked 1,416 Times in 488 Posts
Default

Mine is right next to the dock in a sandy area so it doesn't pick up any sediment usually.It's only in 2' of water so I don't even need to get wet to check it.
SAMIAM is offline   Reply With Quote
The Following 2 Users Say Thank You to SAMIAM For This Useful Post:
TiltonBB (08-15-2021)
Old 08-15-2021, 11:48 AM   #4
TiltonBB
Senior Member
 
Join Date: Feb 2005
Location: Gilford, NH and Florida
Posts: 2,233
Thanks: 399
Thanked 1,682 Times in 676 Posts
Default

Quote:
Originally Posted by CowTimes View Post
You will get much better water quality with drastically less sediment by moving the foot valve out as you suggest. We did the same thing a couple years ago in the same situation, from about 5 feet deep close to shore and moved it out about 75í to around 12í of water, and the difference was night and day for our filters.
How far off the bottom is your foot valve?
TiltonBB is offline   Reply With Quote
Old 08-15-2021, 11:59 PM   #5
Descant
Senior Member
 
Join Date: Mar 2006
Location: Merrimack and Welch Island
Posts: 3,001
Thanks: 871
Thanked 1,118 Times in 701 Posts
Default Go deep

There are other old threads on this, but the consensus seems to be 10' deep as a minimum. We're only seasonal. We use a well pump underwater, about 18" off the bottom. 10 feet deep at full lake. "Filters? We don't need no stinkin' filters." ( Credit misquote to Cheech Marin) The lab test results give us very high water quality.
Descant is online now   Reply With Quote
The Following User Says Thank You to Descant For This Useful Post:
TiltonBB (08-16-2021)
Sponsored Links
Old 08-16-2021, 08:57 AM   #6
CowTimes
Senior Member
 
Join Date: Jan 2019
Posts: 130
Thanks: 8
Thanked 121 Times in 63 Posts
Default

Quote:
Originally Posted by TiltonBB View Post
How far off the bottom is your foot valve?
Our foot valve is about a foot off the bottom (attached to the top of a concrete block). My sense is that once you get far enough from shore and in deep enough water, the waves donít churn up sediment on the bottom so it doesnít need to be too high off the bottom (but you certainly donít want it too close that pulling the water in creates its own current on the bottom to suck up sediment).
CowTimes is offline   Reply With Quote
The Following User Says Thank You to CowTimes For This Useful Post:
TiltonBB (08-16-2021)
Old 08-16-2021, 11:54 AM   #7
codeman671
Senior Member
 
codeman671's Avatar
 
Join Date: Jan 2005
Posts: 2,836
Thanks: 137
Thanked 534 Times in 322 Posts
Default

Our valve is on top of a concrete block so about a foot off the bottom. It is about 200 feet out from shore, in about 4 feet of water. We have very shallow depths where we are. We tried to run it about 500' out to get real depth but were having issues getting the line to stay on the bottom so we cut it back (full disclosure, my prop cut it back!).
codeman671 is offline   Reply With Quote
Old 08-16-2021, 12:27 PM   #8
Descant
Senior Member
 
Join Date: Mar 2006
Location: Merrimack and Welch Island
Posts: 3,001
Thanks: 871
Thanked 1,118 Times in 701 Posts
Default

Quote:
Originally Posted by codeman671 View Post
Our valve is on top of a concrete block so about a foot off the bottom. It is about 200 feet out from shore, in about 4 feet of water. We have very shallow depths where we are. We tried to run it about 500' out to get real depth but were having issues getting the line to stay on the bottom so we cut it back (full disclosure, my prop cut it back!).
Many years ago, most systems used galvanized pipe. No problem with floating, but a short life expectancy and some rust issues. Using poly, we thread it through a few concrete blocks. I also thread it through a larger diameter 8 foot section of poly to protect from ice and wave action rubbing on the rocks where the line comes ashore.
Descant is online now   Reply With Quote
Reply

Bookmarks

Thread Tools
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 On

Forum Jump


All times are GMT -4. The time now is 02:26 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.

This page was generated in 0.40658 seconds