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AGE of WATER HEATERS
ALTERNATIVE HOT WATER SOURCES
ANODES & DIP TUBES on WATER HEATERS
ANTI SCALD VALVES
APPLIANCE DIAGNOSIS & REPAIR
APPLIANCE EFFICIENCY RATINGS
AQUASTAT CONTROL Functions
BACKDRAFTING HEATING EQUIPMENT
BACKFLOW PREVENTER, HEATER WATER FEEDER
CARBON MONOXIDE - CO
CHECK VALVES, WATER SUPPLY
CLOGGED SUPPLY PIPING
CROSS CONNECTIONS, PLUMBING
DEBRIS in WATER SUPPLY, Water Heater
DRAIN a WATER HEATER TANK
ELECTRIC WATER HEATERS
FLOODED WATER HEATER REPAIR
FREEZE-PROOF A BUILDING
GALVANIC SCALE & METAL CORROSION
GAS BURNER Flame & Noise Defects
GAS FIRED WATER HEATERS
GAS PIPING, VALVES, CONTROLS
HEATING COST SAVINGS METHODS
HOT WATER SUPPLY
HOT WATER IMPROVEMENTS
HOT WATER DELIVERY SPEED UP
HOT WATER EFFICIENCY IMPROVEMENT
HOT WATER PRESSURE EXPANSION RATE
HOT WATER PRESSURE LOSS
HOT WATER PROBLEM DIAGNOSIS
HOT WATER QUANTITY IMPROVEMENT
HYDROGEN SULFIDE GAS
INDIRECT FIRED WATER HEATERS
MANUALS & PARTS GUIDES - HVAC
MIXING / ANTI-SCALD VALVES
NO HEAT - NO HOT WATER: HEATER DIAGNOSIS
NOISE, WATER HEATER
ODORS IN WATER
PIPING IN buildings, Clogs Leaks Types
RELIEF VALVE LEAKS
RELIEF VALVES - Water Heaters
SCALE REMOVAL, WATER HEATERS
SEWER GAS ODORS
SOLAR HOT WATER HEATERS
TANKLESS WATER HEATERS
THERMAL EXPANSION of HOT WATER
THERMOSTATS, WATER HEATER
TIMERS for ELECTRIC WATER HEATERS
WATER HEATER ALTERNATIVES
WATER HEATER ANODES, DIP TUBES
WATER HEATER AIR INLET
WATER HEATER DEBRIS FLUSH
WATER HEATER DRAIN PROCEDURE
WATER HEATER EFFICIENCY
WATER HEATER FLUSH PROCEDURE
WATER HEATER NOISES
WATER HEATER PROBLEM DIAGNOSIS
WATER HEATER COMPARISONS, PROPERTIES
WATER HEATER SCALE
WATER HEATER SAFETY
WATER HEATERS for HOME HEATING USE?
WATER ODORS, CAUSE CURE
WATER PIPES, Clogs Leaks Types
WATER PRESSURE TOO HIGH: DANGERS
WATER PRESSURE LOSS DIAGNOSIS & REPAIR
WATER QUANTITY IMPROVEMENT
WATER SOFTENERS & CONDITIONERS
WINTERIZE A BUILDING
Indoor storage tank identification: how to determine the original use of a water storage tank found in a building attic, basement or other location by examining its size, location, piping and other details. We provide photos, clue-lists, piping diagrams and sketches as well as text to help identify the types of tanks found inside old buildings.
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To figure out what the heck was going on with an old tank found in a building attic, basement, crawl space or other locadtion, in particular when the tank appears to have been used for or connected to the building heating system or to its water system, take a look at and record the following information about an unidentified water storage tank in order to guess at its original function.
How to Identify Heating Boiler Expansion Tanks in Attics
It looks from the partial exposure as if the tank is in a location where people used to put expansion tanks on hot water heating boilers - instead of a relief valve, if pressure in the system got too high, water would push into the tank and if the tank got too full, water would flow out of a drain into an outdoor location, sometimes even a roof gutter or downspout.
But this is probably something else. Usually an expansion tank has just one inlet pipe that feeds water from the hot water heating system, and for attic-located expansion tanks, an overflow drain line.
What Makes An Old Steel Tank in the Attic Not a Heating Boiler Expansion Tank?
If the tank is a large one, it's probably not an expansion tank for that reason either.
Because the tank is insulated, it's not likely to be an expansion tank and probably not an attic cistern - people didn't bother to insulate those containers. More likely it was used to store hot water.
And most compelling, as your tank has so many pipes connected to it, we have talked ourselves out of the expansion tank theory entirely.
A hot water tank such as a range boiler would have water coming in from a boiler or supply, water going out to plumbing, possibly heating by gravity or convection. More pipes and connections, a least five for an attic tank:
Also see Plumbing Connections for a Range Boiler above.
Control valves may have provided for manual filling or draining of the tank. One might try arguing that the insulation was to avoid freezing, but that wouldn't explain why you saw no insulation on the pipes connected to the tank - or was it drained in winter and the system left dry?
If the tank was intended to be drained at times, for service or freeze protection, that little hose and drain pan may have been there to permit leaving the drain line open and to catch the last few drips of water from inside the tank after it was drained through its drain line (over by the chimney perhaps).
Watch out for Asbestos
Watch out: regarding the wood-enclosed water storage tank shown at the top of this page, someone may have poured loose fill asbestos around that tank to serve as insulation. If the material is firm and foam-like and pale yellow, and collapses to powder on touch it may be UFFI and not so harmful. But if this is a white, loose, dry powder, watch out - seal it off with plastic until we know what you're dealing with.
Obtain advice from an expert, or in an emergency, clean up a tiny spill with a HEPA vacuum, and don't track this material through the house, or you may create a more costly cleanup job.
UFFI was blown in to building walls during the energy worries of the 1970's oil embargo. Your antique attic tank installation with the paper and pit-saw cut boards (FRAMING MATERIALS, Age, Types) looks much older, probably from the time of original construction of the home back in 1917.
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