Although most septic systems need a plastic riser and lid, some cases make concrete risers the one of choice. Having a riser gives quick and easy access to routine maintenance of the septic system. Read on to determine which kind would be best for you.
Are concrete or plastic septic tank risers better?
Concrete risers are required only in areas where there is heavy traffic above the septic tank. Most
residential septic systems are installed away from the driveway where there is little to no traffic.
But in some cases due to space, the septic tank is sometimes installed in the driveway, such as a
lake lot with a holding tank. If the tank is under a driveway or other area with heavy vehicle
traffic directly above the tank, concrete risers are the only option.
How much does a concrete riser cost?
The material and labor required for installing a concrete riser are significantly more than a plastic
riser. Often a small crane is needed to set the heavy rings. The people hiring a professional can
expect to pay about $1,000 more for a concrete riser versus a plastic setup.
How much weight can a septic riser hold?
Concrete risers with steel lids can easily withstand the weight of a car without breaking or
bending. Plastic risers can easily support the weight of a lawn mower but if a car were to drive
over one, it could break. Note that cars should not be driven anywhere near a septic drain field as
the weight from the vehicle will compact the soil and cause premature failure. Septic tanks
however can withstand the weight of a car or truck if it was designed with a traffic top because of
its significant thickness. Some tanks, especially ones weakened from age, can crack and collapse
from the weight of heavy vehicles. If the septic tank is in the yard, a plastic riser is perfect, but in
the special case of a tank being under the driveway, a concrete riser will better support the weight
of the traffic and last for many years.