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How do you connect the inlet and outlet pipes to a 80's Raypak Gemini water heater.

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I think you push 40mm copper pipe into the iron header and tighten so the rubber grommets seal the connection. Then adapt to PVC. I'm not sure if PVC will fit straight into header or if it would melt?

Posted on Aug 12, 2012

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  • Raypak Master
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They are soldered on with a propane torch kit..

Posted on Feb 13, 2012

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Posted on Jan 02, 2017

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SOURCE: Raypak heater Set Point goes no higher than 70

cant do must replace control

Posted on Aug 25, 2009

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SOURCE: require a wiring diagram for a raypak gemini 3 gas pool heaters

Have you tried http://www.raypak.com/productDocumentSearch.aspx
?

Needs a model number...but I looked at some of the pdf manuals there and they do have wiring diagrams in them

Posted on Dec 03, 2011

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1 Answer

Need to replace heat sensor, where is it located on the unit?


there should be 3 heat sensors on the unit. Incoming water to decide if it needs heat, outgoing water, and a sensor on the burner(flame). the in and out sensor should be behind a panel near the inlet and outlet pipes. The burner sensor is more tricky usually near the igniter or below the heat exchanger inside the unit.

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Jun 18, 2015 | Raypak Rp2100 Pool & Spa Heater Lonox 407k...

1 Answer

Were is cold water inlet and hot water outel on model 71-40d b


Cold inlet and hot outlet are marked on top of water heater.
Usually there is a letter or word embossed into the metal top.

If tank is connected, then turn on hot water tap for a few moment and feel which pipe is hot.

Cold water enters bottom of tank through dip tube located on cold side. If hot and cold are reversed, the water heater will not perform as expected.
http://waterheatertimer.org/Water-heater-dip-tube.html

Aug 05, 2012 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

My waterheater has three water connections on the top of it one has a C for cold is that a inlet or outlet ? The other spot has a H for hot is that a inlet or outlet ? And the other one is not marked what...


My water heater has three water connections on the top of it one has a C for cold is that a inlet or outlet ? IT'S THE COLD INLET. The other spot has a H for hot is that a inlet or outlet ? IT'S THE HOT OUTLET. And the other one is not marked what is that one for and is it a inlet or outlet ? please email me at nsjuby@yahoo.com. The last one is a pressure release valve that lets off excessive pressure when the temperature goes too high in the unit. When you install the heater, it should be installed into the drain pan that existed before or into a new one. You should also install a drain pipe from the valve to that drain pan, or into the drainage system for the house. This may depend on the codes where you live. Also install a good quality shut off valve on the inlet side for emergencies. A Ball type is good. Hope this helps,
Best Mark
I'm new to this site, so I'm not sure if I can email you directly or not. I believe not. Good Luck.

Dec 28, 2010 | Whirlpool Water Heaters

1 Answer

I have a Raypak 2100 hooked up to my hot tub. It has always heated one degree a minute but now it is taking longer and longer to heat tub up. Anything I can do or do i need service?


Check your by-pass valves. You have one on the inlet and outlet pipes this should be closed or nearly so. And their is one inside the water header on the side of the heater. This is a spring loaded disc on a shaft and should move smoothly just from the water pressure coming into the heater. Sanding and cleaning the shaft and disc should fix this. Both of these keep the water from flowing to fast or to slow through the heat exchanger so it warms at the best rate.

Nov 25, 2010 | Raypak Hood shown but not included. A...

1 Answer

Water is leaking from inlet/outlet area. is that a heat exchanger problem?


If there is a water leak in between the pool/spa plumbing and the inlet/outlet manifold, it just needs a new gasket if it is a plastic manifold, and if it is a cast iron manifold, the 2" threads for inlet and outlet need to be unthreaded, then coated with a pipe sealant (non-teflon) then rethreaded.

If this leak is in between the outer and inner inlet/outlet manifold peices, then a new gasket is needed. The part number for that gasket is: 006713f.

If the leak is coming from inside the cabinet and leaking down the interior or exterior, it could be a heat exchanger issue.

The most likely event is that the o-ring that seals the header manifold is worn and needs to be replaced.
This would take about 30 minutes of labor and an o-ring.

Please vote positively if this has helped.

Nov 01, 2010 | Raypak Rp2100 Pool & Spa Heater Lonox 407k...

1 Answer

I have a raypak heater when i fire it up the water temp go's up real fast


I assume this is on a swimming pool. It might depend on how it is plumbed in. Quite often, there is a bypass valve allowing the pool water to bypass the heater incase it's being serviced, or a leak etc. You would close inlet and outlet valves to heater and open the bypass. This would isolate the heater. If you have the bypass open while heating, you will reduce (or eliminate) the flow through the heater. This will allow the water in the heater to heat very fast, and lets be glad there's a temp control or your plumbing would melt. These heaters should have full flow through the heater, and you'll see min temp rise per pass.

Jun 30, 2010 | Raypak Rp2100 Pool & Spa Heater Lonox 407k...

1 Answer

My Raypak versa gas heater for my hot tub will not heat the tub more then 96F, temp control is turned all the way up, just stated doing this, it was fine for a year, thanks


Water flo through the heater is too fast and the water can't get hot enough. Your by-pass valve is stuck closed and you need to open your water header and check it out. Or you may have an external by pass that need's to be opened 10-20%. This will be a valve between the inlet and outlet water pipes going to the heater. Good luck and HAPPY NEW YEAR.

Dec 24, 2009 | Raypak 130,000 BTU Propane Gas Pool...

1 Answer

Water Heater Replacement


1) After shutting off the water and gas or power supply to the tank, connect a hose to the drain valve at the bottom of the tank, open the valve, and run it to a nearby drain or outdoors. Use two wrenches to unscrew the inlet and outlet fittings from the top of the tank. 2) For a gas water heater, shut off the gas inlet valve and use two wrenches to disconnect the union or flare fitting between the gas supply pipe and the inlet valve. Also remove the flue hat that expels gasses into the flue at the top of the tank. 3) After removing the old unit, set the new one in place with the controls and burner accessible. Allow at least 6 inches of clearance around its perimeter, and keep it away from flammable materials. Use a level to check it for plumb; shim the base with pieces of asphalt shingles or plastic wedges. 4) Wrap the threads of the heat trap fittings with pipe-wrap tape, and screw the fittings into the water heater (blue into the cold water inlet and red into the hotwater outlet). Be sure the arrows marked on the fittings point in the direction of water flow. 5) Install new flexible connectors on the water inlet and outlet pipes. If there is no shutoff valve on the cold water side, install one before connecting the water heater. After all connections are complete, open the shutoff valve to fill the tank. While it is filling, open several hot water faucets in the house to bleed off air in the pipes. 6) Assemble the gas pipes as shown. Spread pipe dope on the threads, and screw together the parts, tightening them with one pipe wrench on the pipe and another on the fitting. Follow the manufacturer's instructions for connecting the unit with gas supply tubing. After turning on the gas, test all connections by brushing soapy water on them and watching for bubbles.

Aug 27, 2008 | Stiebel Eltron Tankless Water Heater

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