How to Install a Bladder Water Tank

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Bladder tanks store a pressurized air charge on the surface layer of a steel sewage tank (via an air vent). While accumulated sewage sloshes around in the bladder of the steel tank, the isolated air charge enables incoming airflow to disseminate away from the sewage and bladder mechanism of the steel tank. This eliminates the need for an external airflow source. Malfunctions usually stem from the pump or controls. However, the internal bladder rarely needs replacement if it is positioned away from environmental factors. Opting to install a bladder tank may alleviate some of the pressure from a storm drain.

Things You'll Need

  • Bladder tank assembly
  • Builder's plastic
  • 16 mm air vent
  • 90 mm rubber band
  • Sharp knife
  • 90 mm L-shaped pipe
  • Two S/S bands
  • 50 mm rubber band
  • Rope
  • Box cutter
  • PVC fabric
  • PVC bond
  • Hair dryer
  • Hand roller
  • Evaluate the manufacturer's length and width specifications. Estimate the difference between the quoted dimensions before filling the bladder tank and after filling the bladder tank during operation. Allow a minimal overhead clearance of about 33 mm. However, do not overestimate the bladder tank's volume.

  • Place the bladder tank under your house to help prevent water accumulation beneath the foundation. Ensure a level ground installment location with no surface angle greater than five degrees. A level ground prevents the bladder tank from rolling or slipping. Be sure to choose a location free of sharp edges (such as soiled plots) and areas that may cause slippage or scratching.

  • Clear the surface of all sharp objects and obstructions. Cover the installation location with builder's plastic. Position the rainwater tank by carefully rolling it onto the builder's plastic.

  • Insert a 16 mm air vent into the hole on the bladder tank's surface (near the 90 mm inlet hose fitting). Turn the 16 mm air vent clockwise and fasten the bottom tap until it firmly locks into place.

  • Find the 90 mm closed connection and use a sharp knife to cut open the seal. Insert a 90 mm rubber band into the hose and connect it to the 90 mm L-shaped pipe. Tighten the hose connection with an S/S band.

  • Find the 50 mm open connection. Insert a 50 mm rubber band into the hose and connect it to the 50 mm pipe. Tighten the hose connection with an S/S band.

  • Strap the bladder tank to the ground with rope to prevent rolling and slippage.

Repairing a Bladder Tank

  • Open the hinge on the bladder tank to empty accumulated sewage.

  • Use a box cutter to cut a large piece of PVC fabric to seal off abrasions. Clean and dry the torn area to prepare for sealant.

  • Apply PVC bond to the patch. Wait about five minutes for the PVC bond compound to dry.

  • Apply the PVC fabric to the torn area. Use a hair dryer and hand roller to seal the PVC fabric to the torn area.

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