Apex DOS or Stenner?

[elFloyd]

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 the 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?

 

[Broadfield]

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 the 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?

8' of head is absolutely cake for the DOS... it can do up to 24' vertical lift. Horizontal distance doesn't matter.

 

[Breadman03]

I thought I replied to this question already. Maybe another forum?

Anyhow, I would try using an adjustable occlusion head for one of the channels. Calibrate it to match your fixed head and you should be pretty well set. While the DOS is a good hobbyist pump (I have 3), they really don't compare to a Masterflex/Stenner/Watson Marlow pump as far as build quality goes.

 

[JOKER]

With the auto water change I have found the pickup height of the pump is the key. I have a stenner and in my testing it was off just a little when one pickup point was 3 feet below the other. Instead of removing water from my sump I remove it from the display. Spent many hours testing to make sure the exchange rate was the same as to not get my salinity off. No problems so far.

 

[MaddyP]

I have both the single head (ATO) and double head (AWC) Stenner pumps on my 400g. They are workhorses, to be sure. I don't see any difference in how much each line pumps with the double head, it replaces what it removes to a very precise degree as the heads rotate together. The pumps sit next to the 100g reservoirs so don't have to pump far except for the drain line which runs through the ceiling to the kitchen drain (10 vertical, 35 feet horizontal).

I will say, although I'm extremely happy with both pumps, I wouldn't put one in my living room or under the tank. These are not quiet.

 

[sinekal]

The DOS isn't quiet either when moving that amount of water, and like someone else said, while it's very nice it's not in the league with the master flex you have

 

[JOKER]

My stenner pump has about 6' vertical with a 30' horizontal to my utility room where the water containers and drain are. I think that is why I got some variance with output. It is for sure a workhorse, and a little noisy, but great pump. I know of several that run them for years with no problems, and can replace parts if needed.