Gas line for future use by tankless

[Akiddo]

Just looking for some advice and input. I’m currently in the middle of a home renovation where a new tankless heater is being installed along side my existing (5yr old) 80gal has water heater. To do this they added a new manifold in my crawl space and ran a new 1 1/4 CSST line across my house to the appliance location. The ceiling in the basement is open during this renovation.

I inquired about what would happen 5+ years from now if/when I replace the existing tank with a tankless. I was told a second gas line would be needed from the manifold to the new appliance. I then asked if they could just run that line now and save me the trouble of opening my ceiling again later. They quoted me $2,200 for this additional 1 1/4 CSST gas line, which would just be capped and ready to go when needed.

So - am I planning too far in advance here? $2,200 seems extreme. I plan to stay in the house and I fully expect to replace my existing tank with a tankless at some point. I’m just trying to avoid more work later by running this gas line now while the current construction is ongoing.

Thanks!

 

[Twowaxhack]

So call around and get another estimate.

 

[havasu]

Or, you'll be like me and just replace with another tanked water heater. Those tankless models are just too finicky for me. Just like Ron Popeil use to say, "Just set it and forget it!"

 

[Hamberg]

Guessing the cost is not so much in the CSST but rather the labor to open/close everything up. Is the basement still open? The easy answer is to upsize (if even needed) the 1-1/4" and terminate that with a (larger) manifold at the end of the run. Way to many variables you aren't telling us but what your are asking is just a (simple) size calculation. Here is a good video explaining how to size: .