Frozen Backflow Devices

Your backflow device may be frozen and you not know it.

And you may not know it until you start running your sprinkler system in the Spring. Other places discover it immediately because water started going everywhere!

Here are a couple of pictures of backflow devices we have been repairing for Texas WalMarts. If you weren't caught off guard with the very cold weather we had recently, you're in the minority.

If you're a Waco resident (under Waco water jurisdiction) you may be in for a surprise. Waco's code has changed. If your sprinkler's or commercial building's backflow device is the old kind--and it froze so it no longer functions, you'll have to bring it "up to code."

What does "up to code" mean? It just means your existing system will have to meet the same requirements that a new system would have to meet. Here's the short story:

Your yard is now classified as a "high hazard" from a risk to the potable water standpoint. That means you need a special kind of backflow device called a Reduced Pressure Zone (RPZ or RP). Two important aspects are that it is another expense and it can't be buried.

And THAT brings me back to why we've been so busy lately. We have been repairing and replacing unprotected, uninsulated backflow devices that froze. Part of the new code for Waco is that your fancy new backflow device has to be protected from the cold--so you won't have to do this again.

If we can help, please call us at 254.829.3800. We're licensed to repair and replace backflow devices.

The New Cost of a Sprinkler System-Count Your Zones

Perhaps you have just moved into a home that does not have a sprinkler system, or you're building a new home. Maybe you've read that the addition of a sprinkler system is smart, both from a resale standpoint and as a necessary convenience. So you call around to get some prices from a few companies. (In case you didn't know, Rainstat rarely installs a sprinkler system. We just repair and upgrade them.) Do you go with the lowest? How about the highest? How do you know?

The cost of a sprinkler system is normally thought of as the initial cost--the cost to get it installed. But, how much does it cost to operate? We believe you need to consider operating costs because it is inevitable that costs are going to go up. Maybe a lot.

What factors do you consider when you are trying to determine how much it costs to operate your new or existing system? The process of calculating your system's precipitation rate, a water audit, (some cities that are running out of water are requiring it. Not here, thankfully.) is more complicated than we want to go into here. It can be calculated if you know each head's flow and distance or by literally placing tuna cans all over your yard and measuring the water in the cans over a set amount of time. Call this the Left Brain approach.

Your sprinkler controller, aka "clock" or "the box on the wall," turns your sprinkler system on and turns it off. That's it. Simple. But the decision of how long it stays on for each zone is the critical factor in your operating costs. How is your system broken up into separate, distinct zones? Do you water the shady part of your yard on the same zone you water the sunny part? The shady part needs less water. Is there any way for you to let that part run less than the sunny part? If not, you have a decision to make, "Do I water log the shady part or starve the sunny part?"

These areas are called "hydrozones." And the more accurately you group similar plant materials, shade and slopes, the more efficient you can be--which normally means more is better. But here's the rub.

Your irrigation contractor wants you to have the absolute best system money can buy, but he knows you don't know how to judge that. He also wants you to choose him and knows that his competitor is also bidding this system. So he compromises. He designs your system by covering the area with as few zones as your water supply will allow. Lower price now, higher price every month after that, forever.

What's the difference in price? Easily double--or more! Will you recoup that? Yes, but it can take some time--or maybe not. That's your call.

The bottom line is this: Every new sprinkler system MUST have a scale drawing that shows each head and each zone's area. Under the new rules that went into effect in 2009 it MUST also show every major tree (shade) and hardscape (sun exposure). Look at the plans. Did the irrigator divide your zones by hydrozones? If s/he did, it is probably more expensive initially and cheaper to run.

Now you can get that calculator out and engage your left brain again. Happy calculating!

P.S. If you want to really save water, let us install our smart controller and weather station. It programs itself every day so no water is wasted. Ever.

Thanks for reading!

Autopilot vs. Throttle Lock

I'm no pilot. I know a few and they love Autopilot--especially on long trips. These sophisticated devices keep the plane on a strait and level path at a constant speed. The pilot can sit back and literally read a book with the confidence that the Autopilot is taking care of the plane at least as well as s/he could.

Now consider a simple throttle lock. All it does is keep the engine's speed constant. Sit back and read a book with a throttle lock and it will likely be your last. It will keep your engine speed (not necessarily your plane's speed) constant as it flies you right into the ground. That's precisely the difference between your present sprinkler controller and a Rainstat Controller.

So, in the parlance of Generation Twenty-Something, your *ancient* controller is dead on with the throttle lock. You set it and it repeats your last instruction from now until you intervene. It changeth not. It can't. And it wastes a lot of water because it cannot react to weather conditions. In the process, it "flies" your wallet right into the ground.

Not so with your Rainstat Controller. Like the Autopilot, it reacts to every subtle weather change and corrects itself so your landscape gets just enough to thrive. This used to cost tens of thousands of dollars. You can get one installed for $995.

A Rainstat Controller and Weather Station is the best way to put your sprinkler system on Autopilot.(sm) Please call 829.3800 now to scedule a free on-site analysis of your sprinkler system.

Thanks for reading.








Doug