It takes a few minutes for my tankless water heater to warm up, so we end up wasting a lot of water in our shower. Is there a way to avoid this? A friend mentioned a “comfort valve” or something? What is it and how does it work? Or is there another solution? Thx!
Can I do the opposite? Water pressure in my town is very low, and our tank just can’t supply any two draws, so if someone has a shower, the dishes in the dishwasher just get dry-baked.
You could look into a booster pump. It would be installed as the first thing on your incoming water supply and can boost the pressure to something reasonable inside the house.
That assumes you have good piping throughout the house. If you had old galvanized iron or something similar, the problem might just be that you need to replace your pipes.
The whole town’s got bad pressure. I’m thinking of pulling in water throughout the day so we’d have enough during peak times, like a big toilet reservoir.
Idk the specifics, but probably. I’ve watched many videos on rainwater harvesting and they have storage tanks and pressure tanks.
There are a few choices.
Easiest is go just use the toilet before your shower and turn on the shower before you use the toilet. If you time it right this wouldn’t waste water.
um, the goal is to get the heater going by drawing on the hot supply, right? I’ve only ever seen cold supply hooked up to a toilet. So emptying and refilling the toilet tank doesn’t use up the cooled water in the hot supply line. However, catching cooler shower water in a bucket and using this to manually flush the toilet doesn’t waste the water. It is a lot of effort though.
turn on the shower before you use the toilet
It’s not actually about the toilet, it’s about turning on the shower earlier.
@sheeEttin got it. The point is you turn on the shower.and let.it run while using the toilet.
I know it feels wasteful, but it’s a couple of pennies worth of water.
A couple of tricks I’ve seen in the zero waste forums is saving that water in a bucket and watering plants or flushing toilets with it.
I actually did this when I got my tankless. It saved like 6 units of water which was like 600 gallons over the 3 months but I was only like $17 off my bill.
$17 over 3 months isn’t worth the work imo but if you’re on a water budget or if it costs a lot in your area ymmv.
600 gallons for 17 dollars? That’s very high to me. We pay about 1€ per 1000L, so 600 gallons would cost about 2,20 euros.
America has a lot of desert and water starved areas, so there are higher costs in parts of the states.
Look into retro fitting recirculation pumps. You don’t necessarily need access to the plumbing behind a wall and can add a loop under a sink in your bathroom. Ask This Old House has quite a few videos on the subject: https://youtu.be/KdA_gfau1s4
Here is an alternative Piped link(s):
https://piped.video/KdA_gfau1s4
Piped is a privacy-respecting open-source alternative frontend to YouTube.
I’m open-source; check me out at GitHub.
That fitting is installed between the hot and cold supply lines at a single location/fixture in the house, usually the farthest away from the heater. Then, a compatible tankless heater can use a pump to push hot water out while pulling the cold water back in through the cold supply line - so no extra recirculating pipe has to be installed. You trigger the recirculation with a switch at the fixture, on a schedule, or with an app/smart home device.
If you’re worried about the water being waste recirculation pumps would do. Set them to run based off motion in your bathroom and kitchen.
Everyone is mentioning recirculation systems which will solve your problem. Just keep in mind that if you are constantly circulating the water through your heater, you will also be constantly heating the water. So you will stop wasting water and start wasting heat instead. It won’t be a huge amount and you may live somewhere you need to heat your house anyway.
