pump advice for $50 Herms Build

[augiedoggy]

http://greatbreweh.com has some. For the price though, unless you need small or 12v...

those have an exposed magnet with a crappy clearcoat coating they have added that turns white and starts flaking off into the beer after about 8 uses from the pics I saw...
plus the abs plastic pumps are only food safe to 170 degrees (if you ignore the non approved exposed magnets in them)

the tan pps ones are truely made of all food grade materials and have coated magnets encased in pps plastic...
I recomment the 24v versions though for more flow. also because they are not designed to be used as a solar hot water pump like the black ones they dont have the mppt power circuitry which makes the black ones not work well with pwm controllers for controlling speed.

 

[BeezyB]

Yes I know this is a dumb question, but humor me. I would like to purchase the pwm for the 24v tan pump I have- after looking at the image, I'm not sure how this is suppose to be Connected. Does this pwm just dangle inline between the pump and outlet or are people building boxes just to house this little controller?

 

[ThomasPaine]

Yes I know this is a dumb question, but humor me. I would like to purchase the pwm for the 24v tan pump I have- after looking at the image, I'm not sure how this is suppose to be Connected. Does this pwm just dangle inline between the pump and outlet or are people building boxes just to house this little controller?

If you're just manually controlling flow, why not just use a valve?

 

[thekraken]

those have an exposed magnet with a crappy clearcoat coating they have added that turns white and starts flaking off into the beer after about 8 uses from the pics I saw...
plus the abs plastic pumps are only food safe to 170 degrees (if you ignore the non approved exposed magnets in them)

the tan pps ones are truely made of all food grade materials and have coated magnets encased in pps plastic...
I recomment the 24v versions though for more flow. also because they are not designed to be used as a solar hot water pump like the black ones they dont have the mppt power circuitry which makes the black ones not work well with pwm controllers for controlling speed.

augiedoggy, do you have a link to the 24v pump that you recommend?

 

[BeezyB]

If you're just manually controlling flow, why not just use a valve?

Im trying to cut down on the bulkiness of the setup. I already have a cam on the pump and a tee with temp probe, rather not have another valve after the pump so it's easier to work with when I take the pump/ home/ tee off. That and some comments from previous posts that the Pwm is better for pump longevity.

 

[ThomasPaine]

Im trying to cut down on the bulkiness of the setup. I already have a cam on the pump and a tee with temp probe, rather not have another valve after the pump so it's easier to work with when I take the pump/ home/ tee off. That and some comments from previous posts that the Pwm is better for pump longevity.

Fair enough. I use the valve with this pump, but nothing more. I'm not sure about pump longevity. Mine seems to work fine at a trickle, and can move 2 gals per minute at 12 v

 

[BeezyB]

Fair enough. I use the valve with this pump, but nothing more. I'm not sure about pump longevity. Mine seems to work fine at a trickle, and can move 2 gals per minute at 12 v

Interesting- I have 24 v and am only getting 2 gals/ minute. Maybe not using the right power supply? Wanting to slow that down for recirc mash, but would like a bit more for whirpool chilling. I wonder if simply pinching the hose off a bit when clamping to kettle for recirc would do the trick- I suppose that's essentially what ball valve is essentially on the outlet side.

 

[ThomasPaine]

I think the consensus is still out on pump longevity being effected by either control method. I don't know at all, just using what's available and hoping for the best out of this cheap pump. But yeah pinch the hose. I kinda wish I had thought of that to save some $.

 

[augiedoggy]

augiedoggy, do you have a link to the 24v pump that you recommend?

I'm hunting right now in the woods... you want the tan colored 24v ones that look just like the 12v ones many sellers on ebay allow you to select the voltage... the 3.5 amp 12v one with the white box wired to it also looks promising with 5.2 gpm but it's $40...

 

[thekraken]

I'm hunting right now in the woods... you want the tan colored 24v ones that look just like the 12v ones many sellers on ebay allow you to select the voltage... the 3.5 amp 12v one with the white box wired to it also looks promising with 5.2 gpm but it's $40...

Is this it? Says rated to boiling but nothing about food safe
http://www.ebay.com/itm/DC-New-12V-...hash=item3a9e95a6e6:m:mkRPKnrJE_TYQCWeNJDddRQ

 

[augiedoggy]

Is this it? Says rated to boiling but nothing about food safe
http://www.ebay.com/itm/DC-New-12V-...hash=item3a9e95a6e6:m:mkRPKnrJE_TYQCWeNJDddRQ

Yes ... they are foodsafe here are some sellers who sell the same pumps advertized as being so. I have bought them from 7 different seller now and they are all the same pump only 2 different shades of color and 12/2and 36V versions are available .. I actually went to the manufacturers websites and they are designed for drinking fountain and soda machine use. they have PPS coated magnets and ceramic shafts. the cheaper black pumps have bare exposed magnets to the wort and therefore are not technically foodgrade. plus they are not made of foograde PPs plastic.

http://www.ebay.com/itm/12V-DC-Quie...084119?hash=item21003f8717:g:sYsAAOSw~gRVwsfp

http://www.ebay.com/itm/12V-DC-1-2-...588090?hash=item43e64c97ba:g:DqIAAOSwcBhWWVnA

http://www.ebay.com/itm/MINI-DC-12V...427478?hash=item23599eb096:g:ZnYAAOSwiLdWA514


http://www.ebay.com/itm/High-Qualit...950522?hash=item3aa8413b7a:g:2goAAOSweW5VOMQ0

and so on...