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Verdegaal - Model 115 Volt -Variable Rate Acid Injection
On typical installations, the acid injection probe is placed downstream of filters and flow meter. This is so there is no potential long term damage to the filters and associated equipment. An exception is when the water quality is so bad that it is justified to inject upstream of the filters to keep them clean and operational.
Access for the probe is a % threaded hole. If installing a new system, it is helpful to have the irrigation company pre-install a 3/j inch Tee into the PVC pipe. Put a threaded plug into the threaded hole until the installation is made. Otherwise, Verdegaal Brothers will drill a % inch hole into the PVC and tap the threads.
If the manifold is PVC the probe is installed above ground, where it can be easily seen and accessed for service. If the decision is made to mount the probe into metal, the grower is asked to have a welder create the Va inch port prior to installation. If the manifold is metal or stainless steel. It is recommended to install the probe is below the underground flange fitting, and into PVC.
The problem with installing the probe into metal is that, eventually, a plume of sulfuric acid will cause one side of the wall downstream to deteriorate. This is due to the corrosive nature of concentrated sulfuric acid before it is thoroughly mixed in water.
The drawback of underground placement is that it cannot be observed for leaks or accessed for servicing. Often it is not accessed until after there is a puffing up of the ground from leaking sulfuric acid. The solution is to take a short section of approximately 10 to 12 inch diameter PVC pipe, and cut out a three inch lengthwise section. Install the pipe when backfilling the hole. Next, install a Kristie box or some sort of lid over the vertical pipe. This will allow simple observation of the probe and easier access than excavating the site to get to the probe for replacement.
Once installed, do not disturb the hose. When not injecting, the hose will have approximately 15 psi of acid. When the pump is running, the pressure will be greater than the pressure in the water line. If an acid hose needs to be relocated or replaced, please contact Verdegaal Brothers.
Grower`s electrician to provide:
- Fuse disconnect
- 115 volt nonGFI plug
- 2 minute delay
- 15-30 amp plug wired to the same circuit as the irrigation well or booster pump