The Tank › Experience With Heat Pump Water Heaters
- April 4, 2021 at 10:38 am #26382
Hi, I’m in the field less than I used to be and heat pumps have come into common use, I understand. does anyone have experience installing or living with this type of heater? I’m interested in learning about real world experience with them and any things to watch out for. Thanks!
Yours, LarryApril 4, 2021 at 3:23 pm #26383
I wrote a page with resources, but it is not real world experience
http://waterheatertimer.org/Which-is-best-hybird-heat-pump-water-heater.htmlApril 4, 2021 at 9:10 pm #26385
Thanks Geno! You clearly did a lot of work putting that together!
Yours, LarryApril 10, 2021 at 3:51 am #26400EdmundMorissetteParticipant
Thanks gono It helps meApril 23, 2021 at 11:04 am #26430
Hi, Thanks for posting your guide! Can a second Mg anode can be installed
in a Ruud 65 gal 15 amp model: PROUH65 T2 RU 375-15?
Also, I was wondering about a waterheaterresue.com Dip Tube for this unit? It appears that the cold water inlet is near the bottom of the tank, so would a dip tube not be useful with that configuration?
Lastly, do you have an opinion re: a thermostatic mixing valve for this unit?
Thanks!April 23, 2021 at 1:57 pm #26431
You can easily add a second anode. Ruud uses a hex anode for its primary, so you can put a combo anode in the hot port. I do sell those elsewhere on this site. You’d need an SKU7 if you have 48 inches of overhead clearance, or SKU9 if you have less than that, but at least 12 inches. If the cold water enters at the bottom, there is no way to use a curved dip tube. In fact, the tank doesn’t have a dip tube. I will leave the mixing valve question for others to answer.
Randy SchuylerApril 23, 2021 at 2:05 pm #26432
Hello, I looked at the spec sheet on this heater and didn’t see enough info to be sure, but unless you can put an anode in the hot outlet, I doubt a second anode can be installed. Another option would be to put in a powered anode. The WHR dip tube is for the usual top mounted cold inlet, so I don’t see how it would work here. I’m liking the Caleffi line of mixing valves. You might want to have a look at those: https://www.caleffi.com/usa/en-us/catalogue/mixing-valves-plumbing
Yours, LarryApril 23, 2021 at 4:08 pm #26433
I say again, I am certain you can add a combo to the hot port of this Ruud.
(Later in the day. I was pretty sure Larry was wrong, but we talked and it’s possible I’m the one who is wrong. Attach a picture of the top of the heater and then we’ll know.)
Randy SchuylerApril 24, 2021 at 2:12 pm #26434
Thanks for your comments! The heat pump sits on top of the water heater so that the hot water port is now located on the side of the tank. Does this mean that the hot water port can NOT be used for a second anode?
Rheem /Ruud have pix online of their hybrid water heater: ruud.com/hybridsavings/
If the hot water port **can** be used for an anode, can the powered anode be used along with the factory installed Resistor Mg anode? Unfortunately, Rheem/Ruud has a plastic ring around the factory installed anode which appears to be difficult to remove: youtube.com/watch?v=akee2Hvkfu8
Thanks!April 24, 2021 at 4:05 pm #26435
The Bradford White heat pump has 3/4″ top connection …. not side connection …. however the top connections are estimated 14″ from the water inside the tank.April 24, 2021 at 4:22 pm #26437
… and note that the 80 gallon AO Smith HHPT comes with a powered anode rod, and side connections …April 24, 2021 at 7:01 pm #26440
Hi, I found this picture on the Ruud site. Same configuration from 40 to 80 gallons it seems. About removing the plastic bushing, it’s not too hard. You use a pry bar or large flat screwdriver under the lip of the bushing and put a piece of wood, maybe 3/4″ thick and about a foot long under the pry bar (to spread the force) and pry up at a few spots to remove the bushing. Once that’s out, a socket can go in to fit the anode. It’s almost always 1- 1/16″. I prefer to use a six point socket.
Yours, LarryApril 24, 2021 at 8:03 pm #26441
I’d say now that no combo or other anode can be added, but if someone wanted to replace the hex anode with a powered one, they could. I’m not sure I’d bother unless you’re using a water softener, and maybe even then, not immediately.
Randy SchuylerApril 25, 2021 at 10:01 am #26442April 26, 2021 at 3:27 pm #26443
Thanks for all the comments and suggestions of other possible models!
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