Apex DOS or Stenner Double Head

elFloyd · 10/29/2016, 12:41 PM

My AWC using a dual head Masterflex is not working out... input and output doesn't match. I am at a decision point: Do I replace to Masterflex with a Stenner or an Apex DOS?

I like that the DOS meters input/output, but the Stenner has more muscle. I'll be lifting about 8' then a 50' run through the attic.

Does anyone have enough experience with the DOS to know if it is strong/durable enough?

vhuang168 · 10/29/2016, 01:33 PM

I've been toying with the idea of a dual head Masterflex and found out that I would need adjustable heads to match the input/output.

Did you use heads with adjustable occlusion?

Sent from my iPhone using Tapatalk

elFloyd · 10/29/2016, 01:37 PM

No... just felt the Masterflex was old, and the heads old too. But adjustable occlusion heads may be the way to go. I would hate to buy the new Stenner only to have the same problem.

Breadman03 · 10/29/2016, 02:45 PM

You will want an adjustable occlusion head. Basically, you're dealing with (manufacturing tolerance variation of the pump head+variance of the tubing diameters)*pump revolutions.

I use DOS and it works just fine, but the difference between a DOS and a Masterflex/Stenner/Watson Marlow is like night and day.

10/29/2016, 12:41 PM	#1
elFloyd Registered Member Join Date: Jan 2009 Location: Cumming, GA Posts: 421	Apex DOS or Stenner Double Head My AWC using a dual head Masterflex is not working out... input and output doesn't match. I am at a decision point: Do I replace to Masterflex with a Stenner or an Apex DOS? I like that the DOS meters input/output, but the Stenner has more muscle. I'll be lifting about 8' then a 50' run through the attic. Does anyone have enough experience with the DOS to know if it is strong/durable enough?

10/29/2016, 01:33 PM	#2
vhuang168 Registered Member Join Date: Feb 2015 Location: San Jose, CA Posts: 2,136	I've been toying with the idea of a dual head Masterflex and found out that I would need adjustable heads to match the input/output. Did you use heads with adjustable occlusion? Sent from my iPhone using Tapatalk __________________ Vincent 40g custom AIO --> DSA190Pro

10/29/2016, 01:37 PM	#3
elFloyd Registered Member Join Date: Jan 2009 Location: Cumming, GA Posts: 421	No... just felt the Masterflex was old, and the heads old too. But adjustable occlusion heads may be the way to go. I would hate to buy the new Stenner only to have the same problem.

10/29/2016, 02:45 PM	#4
Breadman03 New Old School Join Date: Feb 2012 Location: Luzerne County, PA Posts: 3,293	You will want an adjustable occlusion head. Basically, you're dealing with (manufacturing tolerance variation of the pump head+variance of the tubing diameters)*pump revolutions. I use DOS and it works just fine, but the difference between a DOS and a Masterflex/Stenner/Watson Marlow is like night and day.