Limit Flow Into Dishwasher - Plumbing - DIY Home Improvement | DIYChatroom
Advertisement


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

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

Like Tree9Likes
Reply
 
Thread Tools
Display Modes
Old 11-15-2019, 03:58 PM   #1
Member
 
Join Date: Mar 2008
Location: Sunnyvale, CA
Posts: 31
Rewards Points: 68
Question

Limit flow into dishwasher


I need to reduce the amount of water flowing into my dishwasher. I came to this conclusion based on these observations:
  1. It does not drain completely.
  2. When I open the door to add a glass I forgot, the water level is up to the door hinge.
  3. Sometimes it stops and shows the light pattern that means "The water level is too high."
  4. If I happen to be hand-washing dishes when the dishwasher is operating, I wait to rinse until the dishwasher's intake valve is open. Then I hand rinse with hot water on full until the dishwasher's valve has closed. When I do this, the dishwasher operates properly and drains fully.
The hot water valve under the sink connects to 1/4" copper tube, which connects to a tee. The dishwasher connects to the tee with more 1/4" copper tube. My last resort is to take a pair of pliers and squeeze the copper tube to limit the flow to the dishwasher, but it would be hard to regulate this.

The city, Sunnyvale, CA, has its own water system. There is no pressure regulator outside our house, which is in a subdivision from 1970. The plumbing was replaced with copper long before we moved in, except one section that was still galvanized from the meter to the house. We had that section replaced with 1" copper a few years ago. No, I don't have a pressure meter.

The dishwasher is 25 years old, but it's a well-built European model, an Asko, that still works well. I am hoping to get some more years out of it by fixing this overfill problem.

I tried to Google 1/4" pressure reducing valve, but came up empty. Any ideas?
StevenS is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-15-2019, 04:42 PM   #2
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 28,762
Rewards Points: 1,182
Default

Re: Limit flow into dishwasher


__________________
Do not use flat bottom gables with scissor trusses.
Nealtw is online now   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-15-2019, 05:11 PM   #3
Member
 
Join Date: Mar 2008
Location: Sunnyvale, CA
Posts: 31
Rewards Points: 68
Default

Re: Limit flow into dishwasher


Thanks, but I have already checked the drain hose, and my model doesn't overflow to the base pan. It actually drains quickly, it's just that there's too much water.
StevenS is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-15-2019, 05:16 PM   #4
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 28,762
Rewards Points: 1,182
Default

Re: Limit flow into dishwasher


Quote:
Originally Posted by StevenS View Post
Thanks, but I have already checked the drain hose, and my model doesn't overflow to the base pan. It actually drains quickly, it's just that there's too much water.
Most have a float that limits the water, it would be in the tub,
huesmann likes this.
__________________
Do not use flat bottom gables with scissor trusses.
Nealtw is online now   Reply With Quote
Old 11-16-2019, 11:19 AM   #5
Member
 
Join Date: Aug 2011
Location: Washington, DC area
Posts: 2,076
Rewards Points: 816
Default

Re: Limit flow into dishwasher


If for some reason, your d/w operates by timer and not float, just turn down the flow rate using the knob on the supply valve?
Nealtw likes this.
huesmann is offline   Reply With Quote
Old 11-19-2019, 04:57 PM   #6
Member
 
Join Date: Mar 2008
Location: Sunnyvale, CA
Posts: 31
Rewards Points: 68
Default

Re: Limit flow into dishwasher


Quote:
Originally Posted by huesmann View Post
If for some reason, your d/w operates by timer and not float, just turn down the flow rate using the knob on the supply valve?
I found the manual, and learned that yes, this dishwasher operates its fill valve by timer, and can be set from 60 to 180 seconds. It was set to 70, so I turned it down to 60, but it still needs less. (It does have a level switch, but that is only a fail-safe, which activates the overfill protection and shuts the machine down.)

I could turn down the supply valve, but that single valve also supplies the kitchen sink, and I don't want to lose the flow rate to the faucet.

I'm going to try my original plan of putting a dent in the copper tubing. I will have to be careful, because I don't want to reduce it too much, so I'll do it in small steps.
StevenS is offline   Reply With Quote
Old 11-19-2019, 05:01 PM   #7
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 28,762
Rewards Points: 1,182
Default

Re: Limit flow into dishwasher


Quote:
Originally Posted by StevenS View Post
I found the manual, and learned that yes, this dishwasher operates its fill valve by timer, and can be set from 60 to 180 seconds. It was set to 70, so I turned it down to 60, but it still needs less. (It does have a level switch, but that is only a fail-safe, which activates the overfill protection and shuts the machine down.)

I could turn down the supply valve, but that single valve also supplies the kitchen sink, and I don't want to lose the flow rate to the faucet.

I'm going to try my original plan of putting a dent in the copper tubing. I will have to be careful, because I don't want to reduce it too much, so I'll do it in small steps.
Usually there is a separate shut off for the DW. I would install that second valve.
bob22, huesmann and Yodaman like this.
__________________
Do not use flat bottom gables with scissor trusses.
Nealtw is online now   Reply With Quote
Old 11-20-2019, 09:54 AM   #8
Member
 
Join Date: Aug 2011
Location: Washington, DC area
Posts: 2,076
Rewards Points: 816
Default

Re: Limit flow into dishwasher


Quote:
Originally Posted by StevenS View Post
I could turn down the supply valve, but that single valve also supplies the kitchen sink, and I don't want to lose the flow rate to the faucet.
So your water pipe comes up from the floor (or out of the wall), into a single valve, then splits after the valve to go to the sink and d/w? How are the hoses connected to the water pipe?
huesmann is offline   Reply With Quote
Old 11-21-2019, 06:46 PM   #9
Member
 
Join Date: Mar 2008
Location: Sunnyvale, CA
Posts: 31
Rewards Points: 68
Default

Re: Limit flow into dishwasher


Quote:
Originally Posted by huesmann View Post
So your water pipe comes up from the floor (or out of the wall), into a single valve, then splits after the valve to go to the sink and d/w? How are the hoses connected to the water pipe?
See these pictures. The flexible 1/4" copper tubing that goes from the 'T' to the right leads to the dishwasher. The stainless steel braided tubing that goes from the top of the 'T' leads to the sink.

The previous owner of the house rotated the sink 45 counter-clockwise when the family room was added, which explains the 1/2" copper pipe.

Quote:
Originally Posted by Nealtw View Post
Usually there is a separate shut off for the DW. I would install that second valve.
It is now clear what my weekend project will be.
Nealtw likes this.
StevenS is offline   Reply With Quote
Old 11-22-2019, 07:56 AM   #10
Member
 
Join Date: Aug 2011
Location: Washington, DC area
Posts: 2,076
Rewards Points: 816
Default

Re: Limit flow into dishwasher


Interesting...I would have thought that a 1/4" line would be self-limiting as far as water flow!

Could you install a needle valve on the horizontal leg of the T?
huesmann is offline   Reply With Quote
The Following User Says Thank You to huesmann For This Useful Post:
StevenS (11-22-2019)
Old 11-22-2019, 08:32 AM   #11
Property Mgt/Maint
 
Join Date: Mar 2015
Location: Upstate NY
Posts: 5,899
Rewards Points: 7,044
Default

Re: Limit flow into dishwasher


Something like this should get you out of trouble
https://www.pexuniverse.com/1-4-od-c...ght-stop-valve


Have you checked the whole house water pressure. May be running to high.
For about $10 a simple gauge like this can be threaded on to any hose bib for a quick reading.
__________________
[political signature removed]
Yodaman is online now   Reply With Quote
Old 11-22-2019, 02:53 PM   #12
Member
 
Join Date: Mar 2008
Location: Sunnyvale, CA
Posts: 31
Rewards Points: 68
Default

Re: Limit flow into dishwasher


Quote:
Originally Posted by huesmann View Post
Could you install a needle valve on the horizontal leg of the T?
Now why didn't I think of that? Thank you very much for that suggestion!
huesmann likes this.
StevenS is offline   Reply With Quote
Old 11-22-2019, 02:56 PM   #13
Member
 
Join Date: Mar 2008
Location: Sunnyvale, CA
Posts: 31
Rewards Points: 68
Default

Re: Limit flow into dishwasher


Quote:
Originally Posted by Yodaman View Post
Have you checked the whole house water pressure. May be running to high.
For about $10 a simple gauge like this can be threaded on to any hose bib for a quick reading.
Thanks for another great idea! I've been thinking about checking the pressure, but never got around to buying a gauge.
StevenS is offline   Reply With Quote
Old 11-22-2019, 04:12 PM   #14
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 28,762
Rewards Points: 1,182
Default

Re: Limit flow into dishwasher


Quote:
Originally Posted by StevenS View Post
Thanks for another great idea! I've been thinking about checking the pressure, but never got around to buying a gauge.
Those gauges come with a hose bib fitting, often outside bibs get full pressure so check pressure at the washing machine hose bib.
__________________
Do not use flat bottom gables with scissor trusses.
Nealtw is online now   Reply With Quote
Old 11-24-2019, 07:39 PM   #15
Member
 
Join Date: Mar 2008
Location: Sunnyvale, CA
Posts: 31
Rewards Points: 68
Default

Re: Limit flow into dishwasher


Quote:
Originally Posted by huesmann View Post
Interesting...I would have thought that a 1/4" line would be self-limiting as far as water flow!
I was wrong. It's actually a 3/8" line.

Quote:
Originally Posted by Yodaman View Post
Have you checked the whole house water pressure. May be running to high.
For about $10 a simple gauge like this can be threaded on to any hose bib for a quick reading.
I finally bought such a gauge at Home Depot. Today the water pressure was 65 psi. I've been told that this is too high, and someone else who lives in my city told me that he recorded pressure more that 100 psi (briefly) at his house.

I was advised to install a water pressure reducing value. Is there anything I should know about buying one? Can I just get a standard one from Home Depot?
StevenS is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

Tags
dishwasher hookup , pressure reducing valve



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





Top of Page | View New Posts