• Glentronics BWD-HWA Basement Watchdog Water Sensor and Alarm
Water damage is one of the main ways that the value of a home can be diminished. Accidents will happen! Water heaters break down and water pours out, washing machines overflow, pipes wear thin and leak - and when these things happen, water will start to destroy your home. Perhaps the most dangerous aspect of water damage is that it can occur with almost no sound - you may not know you have a leak until your basement is flooded! Now, you can minimize the risk of water damage with this Water Alarm. The Water Alarm requires only a 9-volt battery (battery not included), and when placed on the floor it can detect water that is only 1/32"deep! This is thanks to solid state circuitry which is highly reliable. The Water Alarm also has a 6-foot sensor wire, so that you can extend it into a sump pump, or simply mount it on a wall to stretch it to another location. Plus, up to an additional 200 feet of wire can easily be spliced in to provide extra length. When the Water Alarm detects water it emits a loud 110 decibel alarm (as loud as most car horns)! And don't worry that you will miss this alarm if you are out of the house when water is first detected - the Water Alarm will sound continuously for 2-3 days (depending on existing battery life). Consider one for the basement, one for the kitchen, the bathroom, or anywhere that water may become a hazard. Keep your home safe and secure with the Water Alarm. Assembly level/degree of difficulty: No Assembly Required.
  • Requires a 9-volt alkaline battery (not included)
  • Battery-saver feature only uses energy when the alarm is sounding for a long battery life
  • Use to detect leaks before costly water damage is caused
  • Detects as little as 1/32 -Inch of water to offer an effective early warning system
  • Loud 110 dB alarm can be heard throughout the house
  • Detects unwanted water only 1/32" deep
  • Alarm is placed on the floor near water heaters
  • Sensor has a 6' wire
  • Loud 110Db alarm
  • Battery saver feature keeps batteries fresh longer

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Glentronics BWD-HWA Basement Watchdog Water Sensor and Alarm

  • Brand: Glentronics
  • Product Code: BWD-HWA
  • Availability: 20
  • $26.00
  • $22.49



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Dynamic Head

The effect of the Earths gravity on the "lift" or head pressure is fairly simple; for every vertical foot of distance the pump moves the water you are adding one foot of head pressure so the ratio is a 1:1 ratio. The effects of the friction, caused by water as it travels through your hose or pipes, on the total head pressure is a little more difficult to calculate especially as there are slight variations in pipe friction in different hose materials and the smoothness of the inner bore. Basically. for every ten feet of pipe through which the water has to travel travel horizontally will contribute 1 foot of head height; the ratio of the pipe friction loss is a 10:1 ratio.

Plumbing fixtures and bends and corners in your hose also increase the total head you must calculate to ensure the proper final volume from your pump. Every corner with a 90 degree elbow in your plumbing will add 1 foot of head pressure  with a 1:1 ratio. 45 degree elbows, tees and even insert couplers can all have an impact on the final flow.

If you install a pump 40 feet away from the top of your waterfall which is 6 feet above the pump and the tubing is a single run of 40 feet horizontally then you add 4 feet of head for the tubing length (the 10:1 ratio) to the 6 foot differnetial between the pump location and the final height of the waterfall so your final total dynamic head calculation would be 10 feet. This means your final volume of water flow in this water feature or application would be the volume of flow on the performance curve that equaled the gallons per hour at 16 feet. This volume will certainly be much less than the initial volume the pump can move at an open flow or a zero head.

If in the above example your 40 feet of horizontal tubing run also required 3 elbows of 90 degrees then an additional 3 feet of theoretical head would be added and your final flow result would be at 19 feet on the performance curve of the pump. In this example you would want to choose a pump that has the desired GPH rating at 9 feet of head pressure.  Tubing size is also an important factor in accounting for head pressure loss, in general you should never reduce the diameter of the tubing below what the output size of the pump is, this will drastically increase head pressure, and reduce pump performance.  For maximum pump performance, using the largest tubing that is practical is the best choice. A best practice is to use a hose with an inner diameter that is the same as your pumps outlet fitting.