Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 01-11-2008, 22:02   #1
Registered User

Join Date: Feb 2007
Location: Louisiana
Boat: Pearson 27 - Nauti Lady
Posts: 8
Universal M2-12: Hot Water Heater By-pass Question

About a year ago I took my hot water heater circuit offline due to some engine work and bad scaling/clogging in the circuit (still a pretty new boat to me at the time).

I'm putting it back together now. I had a 6" hose installed to loop the circuit; that's off now and the hoses to the hot water heater, located in the lazarette, have been reattached.

Problem: I'm not sure which nipple/connection is the outflow from the fresh water pump, and which is the inflow. The manual is no help whatsoever, nothing is marked.

Apologies for the fuzzy picture, it was dark and taken with a camera phone. I assumed that the connection at the foreground hose was the output from the pump, and should be connected to the inlet at the water heater. The other hose attaches to a nipple just underneath the thermostat housing, which I assumed was the return from the hot water heater to the engine. When I ran it like this, all the coolant from the engine and manifold was pumped into the overflow tank in the lazarette, and stayed there.

Couldn't work on it much more today, so I thought I'd see if anyone can verify which is the inlet and which is the outlet.

Picasa Web Albums - Pete - Sailboat Main...
My Sailing Blog
phallock is offline   Reply With Quote
Old 01-11-2008, 23:18   #2
Senior Cruiser
Lancerbye's Avatar

Cruisers Forum Supporter

Join Date: Mar 2007
Location: Anchored somewhere in the Canadian Gulf Islands, East of Vancouver Island
Boat: Lancer 44 Motorsailer
Posts: 1,710
Images: 32
Normally in a heater application inlet is lower than outlet and the trapped air has to be bled out of your system through the top of the tank if you have a bleed screw or through the expansion chamber.
The basis of accomplishment is in never quitting
Mengzi Meng-tse
Lancerbye is offline   Reply With Quote

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
Hot water heater install SilentOption Plumbing Systems and Fixtures 11 19-11-2008 07:47
Hot Water Heater Installation sneuman Construction, Maintenance & Refit 4 20-11-2007 14:28
Standard vs. tankless hot-water heater sneuman Construction, Maintenance & Refit 5 24-08-2007 03:24
Hot Water Heater RETTSIE Plumbing Systems and Fixtures 1 05-07-2007 06:31
Perkin 4-108 hot water heater connections RETTSIE Construction, Maintenance & Refit 1 05-07-2007 06:04

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 21:14.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.