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Meziere WE100U

Meziere Expansion Tank 28 oz


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JEGS Round Recirculating/Overflow Catch Can with Filler Neck Clear Anodize Finish
JEGS 555-51138

Meziere Expansion Tank 28 oz $116.13
Out of stock
Expansion Tank
  • 28 oz
  • Polished
  • Specifications:

    Height (in.)
    Width (in.)
    Mounting Hardware Included
    Overall Length (in.)
    Capacity (oz.)
    Drain Valve Included
    Inlet Attachment
    Female Threads
    Inlet Quantity
    Outlet Attachment
    Female Threads
    Overflow Tank Finish
    Overflow Tank Material
    Overflow Tank Mounting
    Sold individually
    Inlet Size (in.)
    1/4 NPT
    Outlet Quantity
    Outlet Size
    -8 AN
    Manufacturer's Part Number:

    Responsible for two different functions, these quality aluminum tanks are essential to any high-performance cooling system.

    Recovery Tanks are designed to catch overflow liquid and purge air during heat cycles. This enables the cooling system to remain full of water and minimizes maintenance. Keeping the system full decreases aeration and preserves pressure. As the temperature rises, the water expands and pressure builds. If the system is completely full, expansion pressure exceeds cap pressure and overflows into the recovery tank. If the pressure cap is properly located on the low-pressure side of the system, air is pushed out first. As the system cools, a vacuum is created. If the radiator cap has a valve that opens under negative pressure, it pulls coolant back into the system. The tube that extends to the bottom of the recovery tank transfers the coolant back to the radiator.

    The recovery tank should be mounted as close as possible to the pressure cap. The line should be short and level to reduce restriction and the effects of gravity. If the tank is kept 1/3 full (with the engine cold), every heat cycle will automatically purge more air from the system. The opposite is true without a recovery tank or with improper pressure cap location: every heat cycle will push out water, which leaves more air space that can be compressed to lower the boiling point.

  • Length: 10''
  • Capacity: 28 ounces
  • -12AN O-ring sealed cap
  • Made from 2'' x 3'' x .125'' rectangular aluminum
  • Top 1/8'' NPT Port: Use as a vent to the rear of the vehicle
  • Bottom 1/8'' NPT Port: Sealed but can be accessed if needed
  • Includes stainless fitting that reaches the bottom of the tank to initiate "recovery"
  • Two crosstubes (with 1/4'' hole and 5/16''-18 thread) welded into the tank for vertical 5'' center-to-center mounting

    Expansion Tanks are also referred to as surge tanks, header tanks, and air separators. An expansion tank is used as a fill point when the top of a radiator is lower than an engine's water outlet. A properly plumbed expansion tank can fix many cooling problems associated with trapped air. The bottom of the tank is plumbed to the low-pressure (suction) side of the cooling system (after the radiator core and before the pump impeller). The smaller fitting on the upper part of the tank is plumbed to the high points on the engine and radiator to remove trapped air and aerated water. Away from the main flow of water, this high reservoir allows air to be purged for a more efficient cooling system overall.

  • Length: 10''
  • Capacity: 28 ounces
  • Full-size radiator cap opening
  • Made from 2'' x 3'' x .125'' rectangular aluminum
  • Bottom -8AN Port: Connects to the low-pressure side
  • Two Side Ports (1/4'' NPT): For high-pressure connections
  • Works great when used in conjunction with a remote water pump
  • Two crosstubes (with 1/4'' hole and 5/16''-18 thread) welded into the tank for vertical 5'' center-to-center mounting

  • WE100U is rated 4.0 out of 5 by 1.
    Rated 4 out of 5 by from Solid quality, just what I needed. After extensive research on an aftermarket expansion tank for my 1968 C3 Corvette, this appeared to be the best option. With this in tow, and a trip to my hardware store I quickly had everything all built up and good to go. Unfortunately, the hardware store trip added another $55 or so in cost, so keep in mind that all the fittings may not be cheap. I also had to go with o-rings on a lot of the fittings. I guess my only gripe is that the item is actually quite small for capacity. It maybe holds a 1/2 a liter, probably a bit less? It looks larger in the picture and the dimensions are a bit misleading, but make no mistake that this is surely not very high capacity. All that aside, it did the trick on my 1968 C3 Corvette, where no other product seems to be an option.
    Date published: 2014-12-26
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