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mrfeetman · Feb 4, 2009, 09:12 PM

Hi guys, here is my problem. I bought a Titan tankless water heater ( SCR2 N-100 ) and installed it which wasn't too difficult. After the installation the heater work fine ,except the pressure from the hot water side is very weak, the cold water pressure to the rest of the house is fine. Now Iv'e got a few theories but I am just really guessing. Here goes: (1) I notice that the heater came with two 1/2 inch copper fittings about 1 feet each in length that attaches to both the hot & cold side but I also notice that the hot water pipe that its joined to which goes through the wall into the house is 3/4 inch then ends up back to 1/2 inch at the fixtures. (2) maybe the cold water side of the heater might be blocked up (3) maybe I need a bigger water heater . Well I don't really know and I hope some one can help me sort this out. By the way if this helps , I have two bathrooms and the washing machine doesn't use hot water.Thanks guys.

Milo Dolezal · Feb 4, 2009, 11:44 PM

Sorry to say this: you purchased "wrong" heater. The problem is the 1/2" intake. Problem multiplies when demand for hot water is high. Read the instructions and tell us what's the macimum GPM flow for this heater.

mrfeetman · Feb 5, 2009, 07:31 AM

Hello Milo Dolezal ,thank you for responding, according to what I've found out the max in the manual looks like 4GPM, but what really pisses me off is the fact that I had explain my water requirements to the retailer and he said this heater would supply my entire house. I don't know if I can return it but I will try.

Milo Dolezal · Feb 5, 2009, 08:07 AM

Yes, it is a low capacity and low performance heater. You need heater that delivers at least 8.5 gallons / minute and more. There are quite a few of those on market these days: Rinnai, Takagi, Noritz are among the good performers. Your heater doesn't have the capacity to heat hot water as demands requires. The more hot water you want, the less water is flowing through pipes.

We installed few of the low performing heaters years back. (like Bosh Aqua Star, old Paloma ). Price was always the deciding factor for our customers. ( these heaters cost about half of a good one and you don't have to run new gas line). However, we've heard nothing but negative feedback regarding unit's performance.