Installation of Surge Tank Risers

Some engineered low pressure pipe systems, aka drip or Bell-Patt systems, have been installed using a surge tank for distribution of the effluent to the field sections, instead of a valve system.  Unfortunately, most of these surge tanks were installed without perforated risers and/or section plugs.  In many cases, either because of the relative placement of the inflow line from the pump into the surge tank,  or because the outfall pipes are not level in the bottom of the surge tank, the quantity of effluent being distributed to each field section is not equal, resulting in some sections being too wet and others too dry.  The lack of a plug has prevented resting one field section at a time, which is recommended by the engineer for field longevity. 

Also, in systems where the field sections are not all the same size, the smaller sections may be wet from receiving proportionally too much water and the larger sections are dry.  In some cases this has led to effluent surfacing in the field.

We can install perforated risers and section plugs in your surge tank, similar to the illustration,  in order to get your field operating properly.  If your field sections are of unequal size, the risers will be made with a proportional number of perforations, so that each section receives its proper percentage of water.  In most cases, this repair costs about $150.00.

Maintenance:  These risers are a slip fit and are not glued.  In the illustration, Section B is plugged and the other 3 sections are open.  After 6 months, the plug should be pulled out and inserted in another section outfall, such as C.  The perforated riser from C goes into B.  The plug is rotated every 6 months thereafter.