Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 20-10-2017, 08:14   #1
Registered User

Join Date: Dec 2011
Boat: Catfisher 28
Posts: 149
Disconnect pressure switch on pump for watermaker?

We have a spectra watermaker and thought one of the pumps went bad but when I checked it with out the pressure switch on the bottom the pumps seem to work fine. Anyone know if its ok to run it with out the pressure switch in the watermaker setup?

We have 2 pumps.

Thanks
__________________

__________________
deepthought is offline   Reply With Quote
Old 20-10-2017, 08:59   #2
Marine Service Provider
 
SV THIRD DAY's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: La Paz, Mexico
Boat: 1978 Hudson Force 50 Ketch
Posts: 3,640
Re: Disconnect pressure switch on pump for watermaker?

A diaphragm pump is a positive displacement pump, so running it without the pressure switch will over amp the motor and trip the pumps thermal overload if all of the pumps output is not allowed to flow. So it won't work. Need to replace the switch or risk damaging the pump motor.
__________________

__________________
Rich Boren Goodbye Morro Bay...Hello La Paz, Mexico and the owner of:
Cruise RO Water High Output Water
Technautic CoolBlue Refrigeration
SV THIRD DAY is online now   Reply With Quote
Old 20-10-2017, 19:09   #3
Sponsoring Vendor
 
Tellie's Avatar

Community Sponsor

Join Date: Oct 2007
Location: Hollywood, Fl.
Boat: FP Athena 38' Poerava
Posts: 3,034
Re: Disconnect pressure switch on pump for watermaker?

Rich, you know I love ya man. Normally this is good advice and certainly makes perfect sense. But in the real world this is not an issue at all. Because of the nature of how a Spectra watermaker works, bypassing the pressure switch and direct wiring this particular feed pump is not a problem. deepthought's system is either a 380C, Santa Cruz, or the latest version a Cape Horn Extreme. In my personal opinion either of these three units are the knock down, drag out, go around the world watermakers. In fact years ago, after working with Spectra for a few years, they told me to pick any watermaker I wanted to put on my boat and I instantly chose the Cape Horn Extreme. You can run these two feed pumps dry for days, over pressurize them and under pressurize them and they will still keep on going without ill effect or any damage to the system. The Clark pump that is used on these systems is designed to take three times the pressures normally created by the the feed pumps and can certainly take much more. It would almost be impossible for these two feed pump to do any damage ether to themselves or to the rest of the system if over pressurized. Now I assure you this is not going to be Spectras advice for obvious reasons, but I have worked on thousands of these units and have bypassed the pressure switch many, many, times with zero effect. As I have stated to many customers many times, there are Spectras rules and then there are J.T.'s rules. These feed pumps do have one weak link and it is not a Spectra design. These are the two hot leads to the pressure switch. They are (GASP, faint, and cause southern women the Vapors) spade fittings. They are subject to corrosion and oxidation and are known to be an issue. Sotake the two red wire leading from the pressure switch and temporarily splice them together and go forward. When the time comes to replace a worn out feed pump head (it will happen) it will come standard with a new pressure switch and you can re-wire it back.
Tellie is offline   Reply With Quote
Old 20-10-2017, 19:18   #4
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 16,835
Re: Disconnect pressure switch on pump for watermaker?

Maybe put silicone grease on the connectors the second time?
__________________
a64pilot is online now   Reply With Quote
Old 20-10-2017, 19:44   #5
Registered User

Join Date: Dec 2011
Boat: Catfisher 28
Posts: 149
Re: Disconnect pressure switch on pump for watermaker?

Thanks for the advice yes it is a 380c and I have bypassed the switch and it is working fine. I was bit desperate earlier because I had everything out so I checked couple other watermakers around the anchorage.. One I dont remember the name just told me he didnt have the pressure switch connected and never had. I also saw a Schenker watermaker onboard another boat which looks very similar to my setup just with alot more electronics but I noticed that both of the pumps on it (looked the same as what I have) also did not have the pressure switches connected at all. So I will assume it is safe to not need it.
__________________
deepthought is offline   Reply With Quote
Old 20-10-2017, 21:35   #6
Senior Cruiser
 
senormechanico's Avatar

Cruisers Forum Supporter

Join Date: Aug 2003
Boat: Dragonfly 1000 trimaran
Posts: 5,786
Re: Disconnect pressure switch on pump for watermaker?

I dunno, maybe we should have a long multipage "crimp vs solder vs just connect those spade connectors"...
<sarcasm>
__________________

__________________
Memento,homo, quia pulvis es, et in pulverem reverteris.
senormechanico is offline   Reply With Quote
Reply

Tags
water, watermaker

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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
450: 300 Amp battery disconnect switch skrtnbrnk Lagoon Catamarans 1 27-12-2016 15:21
Solar disconnect switch? OrangeCrush Electrical: Batteries, Generators & Solar 30 06-12-2016 10:56
Starter/batt disconnect switch ontherocks83 Electrical: Batteries, Generators & Solar 5 08-12-2013 11:56
For Sale: Perko Marine Main Battery Disconnect On Off Switch mtbdude7 Classifieds Archive 0 09-10-2012 12:55
Three-Prong Oil Pressure Switch and Electric Fuel Pump - Is a Fuel Pump Relay Needed? sdowney717 Electrical: Batteries, Generators & Solar 4 29-09-2011 08:06



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 22:39.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.