Stenner 45MHP2 Pump Install

poolhound

LifeTime Supporter
May 17, 2008
54
Elgin, SC
#1
I am ready to order a Stenner Pump to upgrade my bleach addition system from the Liquidator. Is there an advantage to upgrade the supplied tubing from 1/4" to 3/8"?
I will go with the black tubing but do not understand what difference the tubing size will make. Also, I'm planning on reusing the Liquidator tank, any problems with that?
 

NeedMoreSun

LifeTime Supporter
#2
The larger tube would be great if you have really long runs, but the Stenner handles head pressure great so not likely anything you need to worry about. I own three Stenners, a single head and two dual heads, each is pumping up 10 feet, over 30, and down 10. Or, drawing the same distance. Not for my pool though :) I use them for a 300 gallon reef tank but need the amounts being moved even more exact and they work great!
 

dsmith99

Silver Supporter
Jun 18, 2016
236
SW, Iowa
#3
The larger tubing is not really needed for a pool application. If you were using the big pump tubes, and pumping over a long distance the large tubing might be a worthwhile upgrade.

What pump are you going with? The fixed rate, 100 psi pump controlled by a timer works great for a pool. It's not only cheaper but a lot simpler and more reliable than the adjustable rate pumps with the mechanical timer.
 

GDN

Bronze Supporter
Oct 17, 2016
308
Dallas, TX
#4
After research I also wanted to stay away from the adjustable/variable pumps due to the extra maintenance/repair of that mechanism. I had a timer already so that made the decision easy. I don't think the tubing makes any big difference. If you want more flow, upgrade from the 3 gallon to the 10 gallon. It's the exact some motor, just a larger tubing inside the pump itself. You can change that yourself. I've had my stenner installed about 3 weeks and couldn't be happier. Definitely the way to go for liquid chlorine. My information: https://www.troublefreepool.com/threads/136912-Stenner-install-Pentair-ET8
 

RonsPlc

Silver Supporter
LifeTime Supporter
May 31, 2015
590
Gaylesville, AL
#5
I have a variable output pump, but I leave it set to full flow to save on the wear and tear of the mechanism. I just use a timer to adjust my chlorine levels throughout the season. I have been VERY happy with it!.
 
OP
OP
poolhound

poolhound

LifeTime Supporter
May 17, 2008
54
Elgin, SC
#6
Thanks for the help. I will tie my Stenner into my mechanical Intermatic timer which controls the filter pump so that the Stenner only runs when the pump is on. I ordered the 45MHP2 adjustable pump. My reasoning was that I will try to run the Stenner at 100% and set the pump timer to inject the needed amount of bleach. If I need to run the pump more than the Stenner I can adjust it down from 100% but should still be a high %. I didn't find a big price difference between the fixed rate and adjustable Stenners.