Penductor

[ldzielak]

Steve,

Just to tell you about my experience with these pumps, I had the 4MDQX-SC on my return, with about 5' of head I'm guessing. I switched it out for a MAK4 and I get just a tiny bit more flow. The 4MDQX-SC is a flow rated pump and not for pressure.

I also have a MAG18 on closed loop and having opened it up, the design is not for pressure. I have not pulled the MAK4 appart, but I figure this is a much better pressure pump. I also have a Iwaki MD55RTL on my ETSS800 simmer, a real pressure pump rate for 17 PSI, I can see the difference in the impeller design and the mag and LG are no match. I would guess the MAK4 is not far behind the Iwaki.

Lee