ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Recent Posts
2017 NEC Changes
by HotLine1. 12/11/17 12:10 PM
Casino Wiring methods
by HotLine1. 12/09/17 10:44 AM
Ground wire Size to water Line.
by HotLine1. 12/05/17 12:11 PM
Flexible conduit to an outside Spa
by gfretwell. 12/05/17 12:28 AM
Dimmable LED 2x4 lay in fixtures
by Vulsion. 11/30/17 06:37 PM
New in the Gallery:
Gallery Test
Popular Topics(Views)
243,015 Are you busy
179,418 Re: Forum
170,377 Need opinion
Who's Online Now
0 registered members (), 22 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#202783 - 08/27/11 04:27 PM Water Line Switch  
Admin  Offline

Joined: Oct 2000
Posts: 3,460
I was installing a new electrical hookup for a disposal last week and ran across this. The supply for the old disposal was run through this and then to a snap switch inside the sink cabinet. The home was built in the 1870's and I was told the kitchen was added around 1900.

This switch was incorporated in the cold water supply line under the sink. I'm interested in what purpose this served at one time.

Thanks in advance. Jeff (electricianjeff)

[Linked Image]

[Linked Image]

Tools for Electricians:

#202786 - 08/27/11 04:40 PM Re: Water Line Switch [Re: Admin]  
wire_twister  Offline
Joined: Jul 2007
Posts: 265
Georgia USA
Just a guess, maybe to keep the disposal from operating without water running. Just my 2 cents.


Life is tough, Life is tougher when you are stupid

#202791 - 08/27/11 06:23 PM Re: Water Line Switch [Re: wire_twister]  
sparky  Offline
Joined: Oct 2000
Posts: 5,311
10-4 WT, looks like a pressure cutout to me

#203046 - 09/06/11 11:08 AM Re: Water Line Switch [Re: Admin]  
beal73  Offline
New Member
Joined: Sep 2011
Posts: 1
My guess would be a pressure switch for a well pump. Back in the day they would have used a shallow well pump and since there would be no need for running water other than in the kitchen, the switch was under the sink.

#204670 - 12/28/11 11:03 PM Re: Water Line Switch [Re: Admin]  
SparksNmore  Offline
Joined: May 2005
Posts: 16
I wish I had a dollar for each one of those that I've removed.

When the Insinkerator was invented back in 1927, they were afraid that folks, not being accustomed to garbage disposers wouldn't remember to run cold water and wanted to be sure that it could not turn on unless there was water flow.

#205849 - 04/11/12 03:08 AM Re: Water Line Switch [Re: Admin]  
paul_deelen  Offline
New Member
Joined: Apr 2012
Posts: 2
on commercial vessels this is common looks of sensors.
well for me, yes i know the navy is better

Paul Deelen
phone +31736139136
skype to paul.deelen

#211193 - 09/24/13 03:29 AM Re: Water Line Switch [Re: Admin]  
MarkC10  Offline
Joined: Sep 2013
Posts: 43
CA, Inland Empire
Good answers above .. I would tend to think it's an electrically controlled valve, why ... ? maybe it was cheaper or less maintenance than having a mechanical valve. less effort thats for sure .. now I've seen the reverse with air switches whereas the air engages a relay for the power but water doing that would be pretty weird .. unless it was to act as a type of flow switch maybe a signal light went off when water flowed .. strange but somewhat in guinness.

Anyone claiming to know everything about Electrical, is wrong.

Member Spotlight
CA, Inland Empire
Posts: 43
Joined: September 2013
Show All Member Profiles 

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman


Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.021s Queries: 15 (0.005s) Memory: 0.7857 MB (Peak: 0.9404 MB) Zlib enabled. Server Time: 2017-12-12 20:05:05 UTC