Franklin Park Backflow Tester

March 3, 2023

We recently tested a backflow device connected to the domestic water line. The test failed and we determined that the device needed to be repaired or replaced.



If you have any backflow testing needs, contact Larry's Plumbing at 847-455-4150.


Larry’s Plumbing is certified to test your backflow preventer and also perform your annual test and certification.

Residential or Commercial RPZ Testing


From $169 – Call for exact pricing estimate, 847-455-4150.

A Reduced Pressure Zone Device (RPZD, RPZ or RPZ valve) is a type of backflow prevention device used to protect water supplies from contamination. RPZDs may also be known as reduced pressure principle backflow prevention devices, or reduced pressure zone assemblies.

August 26, 2026
Returned to the job site to televise the roof drain from inside the building to the outside manhole. Utilized a lift to cut out the existing leaking 6" roof drain connection and multiple fittings. Removed debris and prepared the area. Re-piped the main 6" PVC and fittings, installed a cleanout, and secured the pipe vertically with support hangers and bracing. Tested the system and cleaned the work area. It's now ready for use.  Hydro jetted from the cleanout of the roof drain towards the side of the building's manhole. Flushed the fixture and conducted tests, which passed. It is ready for use.
August 21, 2026
8/18/26 After sawcut and concreted removal, excavated down to new 6" SDR on outside and to old 4" cast iron on inside area 5' deep. Broke out old CI and tunneled under foundation. Stubbed new 6" grease line into building with wye and cleanout. Bedded in stone. Removed concrete and hauled away spoil.  8/19/26 Returned after inspection to backfill in stone over bottom of footing and haul spoil. Removed all inside spoil and hauled away.
August 12, 2026
Arrived to jobsite and met with pumper truck in order to service the 2 pump pits. Began pumping the pit all the way in back flushing it as well with tons of water. Began pumping other pump pit, flushing it down as well. Found lots of debris in pits like plastic and metal. Jetted from L2 to B7 as well as televised, drains are clear. Descaled trench drains in B7 ,L2 ,and GR1. Flushed all drains in B7,L2 and GR1. Everything is working properly. Cleaned work area.
More Posts