Maybe this is just my building, but I need a sanity check. I’m on the fourth floor of a six-story prewar walkup over by 110th and Lex. If I shower after 7:45 on a weekday, the water goes from hot to room temp in like three minutes. Doesn’t matter if I let it run first. The super says the boiler is fine and I just need to get up earlier. Is there an actual cutoff time for these old systems, or is it a floor-by-floor lottery? I’m trying not to become a 6 a.m. shower person just because the people above me take twenty-minute steamers. Anyone else deal with this or know what to ask the super to actually check?

I’m new to this kind of building—mostly I’ve been in a two-family in Dyker. But I crashed at a friend’s place on 112th a couple weeks ago and took a shower around 8:15, and yeah, it was freezing. I thought maybe it was one of those timer systems, like hot water only runs certain hours? Do people on lower floors get it first? Is it better to just keep the faucet dripping to keep the line warm? Sorry if that’s dumb, trying to learn. Also does your super charge to look at it or is that just a regular maintenance thing?

EastHarlem_E, it’s not a timer—that’s the most common misread. Most of these old six-story walkups have a gas-fired storage tank or, if you’re lucky, a coil in the boiler. The hot water leaves the basement and works its way up through a single riser. The first accounts are lower floors: they get first pull, so by the time the fourth and fifth floors open a tap on a busy weekday morning, the stored hot water has already been partly replaced by incoming cold water. It isn’t exactly floor-by-floor, but upper-floor units on the same riser usually feel it first, especially if multiple apartments are showering at the same time.

What I’d ask the super to check:

• Is there a mixing valve on your riser? If it’s set too low, you’ll get warm rather than hot even when the tank is fine.
• Are your shower valve cartridges old? Sometimes the pressure-balance valve fails and makes cold water dominate.
• Does the recirculating pump actually run in the morning, or only for the radiators?
• Is your apartment sharing the same riser with a laundry or multiple bathrooms above?

In my Astoria prewar, the hot water is reliable until about 8:15, then it dips for twenty minutes while the whole house showers. I solved it by showering before 7:10 on weekdays and by replacing my shower head with a lower-flow model—it’s not magic, but it stretched the hot water a little. If you’re on friendly terms with a neighbor above, ask what time they shower. That will tell you more than the super. Just don’t leave a faucet dripping; that won’t heat anything up, it just wastes water.

astoria_arch, this is super helpful. I asked my super about the mixing valve and he looked at me like I asked him to rewire the building. But I’m going to push again, because the water isn’t just lukewarm—it flips to cold mid-rinse. I’ll try 7:05 tomorrow and see if that fixes it. DykerNewbie, don’t shower at your friend’s after 8 unless you want a character-building experience. Also, to answer your question: the super shouldn’t charge for this kind of thing if it’s a building-wide problem. Mine just acts like I’m crazy.