Question about Diaphragm Pump

MikesReef83 · 04/01/2014, 07:05 PM

If I place the pump about 3-4ft above the reservoir and sump should I still add a check valve? I'm thinking I shouldn't have to worry about backsiphoning with the pump up higher than both.

Avast Marine · 04/02/2014, 09:01 AM

As long as the output tube is above the waterline this should work fine. It is a good idea to test it first just to make sure, but I see no issue with this.

MikesReef83 · 04/02/2014, 11:56 AM

Great thanks. Just ordered the ato with float valve and pump. Hope it works on my rubbermaid stock tank sump.

MikesReef83 · 04/22/2014, 09:46 AM

Would this pump draw ok if my reservoir was about 10 ft away from the pump?

Avast Marine · 04/23/2014, 05:14 AM

Quote:

Originally Posted by MikesReef83

Would this pump draw ok if my reservoir was about 10 ft away from the pump?

Absolutely no problem with this, it can push many times that amount.

MikeTV1 · 05/01/2014, 03:54 PM

What is the recommended max run time on these? I know they are not good for continuous, but is there a limit? Is it a cooling issue such that cycled on and off with cooldown time, it could run for a total of 1-2hr per day?

I use two ebay peristaltics now to do a slow water change daily, roughly 3 gallons is pumped out with roughly 10ft of head pressure. Standard pump is used to "top-off" with fresh salt water during this time period. The peristaltics were cheap but loud and I need to replace them with something better now that I know the process as a whole is feasible.

Avast Marine · 05/02/2014, 06:55 AM

They have a 25% duty cycle so 6 hours a day. Occasional use over this will not kill the pump but will reduce its life. We tested for 7 weeks continuous use 100% duty cycle before failure, they are tough little pumps.

04/01/2014, 07:05 PM	#1
MikesReef83 Registered Member Join Date: Jun 2013 Location: Saint Genevieve, MO Posts: 221	Question about Diaphragm Pump If I place the pump about 3-4ft above the reservoir and sump should I still add a check valve? I'm thinking I shouldn't have to worry about backsiphoning with the pump up higher than both.

04/02/2014, 09:01 AM	#2
Avast Marine RC Sponsor Join Date: Feb 2006 Location: Northern VA Posts: 2,446	As long as the output tube is above the waterline this should work fine. It is a good idea to test it first just to make sure, but I see no issue with this. __________________ Dan Don't rush art, you get bad art.

05/01/2014, 03:54 PM	#6
MikeTV1 Registered Member Join Date: May 2002 Location: Stillwater Posts: 150	Recommended run time What is the recommended max run time on these? I know they are not good for continuous, but is there a limit? Is it a cooling issue such that cycled on and off with cooldown time, it could run for a total of 1-2hr per day? I use two ebay peristaltics now to do a slow water change daily, roughly 3 gallons is pumped out with roughly 10ft of head pressure. Standard pump is used to "top-off" with fresh salt water during this time period. The peristaltics were cheap but loud and I need to replace them with something better now that I know the process as a whole is feasible.

05/02/2014, 06:55 AM	#7
Avast Marine RC Sponsor Join Date: Feb 2006 Location: Northern VA Posts: 2,446	They have a 25% duty cycle so 6 hours a day. Occasional use over this will not kill the pump but will reduce its life. We tested for 7 weeks continuous use 100% duty cycle before failure, they are tough little pumps. __________________ Dan Don't rush art, you get bad art.

04/02/2014, 11:56 AM	#3
MikesReef83 Registered Member Join Date: Jun 2013 Location: Saint Genevieve, MO Posts: 221	Great thanks. Just ordered the ato with float valve and pump. Hope it works on my rubbermaid stock tank sump.

04/22/2014, 09:46 AM	#4
MikesReef83 Registered Member Join Date: Jun 2013 Location: Saint Genevieve, MO Posts: 221	Would this pump draw ok if my reservoir was about 10 ft away from the pump?