General

Posted on 01st January 1970 at 1:00am

Water Hammer - it's Causes and Solutions

Causes of Water Hammer

Like any other moving fluid, flowing water has momentum.  When subjected to a sudden change in flow, shock waves propagate through the system.  This occurrence is referred to as ‘water hammer’.  Flow changes can occur due to the operation of valves, the starting and stopping of pumps, or directional changes caused by pipe fittings.  Other causes may be the rapid exhaustion of all air from the system or the recombination of water after water column separation.

Water Regulations for Non-Domestic Dwellings

The use of mains water in England and Wales is regulated by the Water Supply (Water Fittings) Regulations 1999, an Act of Parliament which lays down what can and cannot be done with drinking (potable) water supplied by the water companies. The Act contains two important principles: water should not be wasted and water should not be contaminated.

In order to comply with the first principle, it is important that the water provider is contacted before an irrigation system is installed, with information on what system is being proposed.

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Water Regulations for Non-Domestic Dwellings
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Explanation of the Water Supply (Water Fittings) Regulations 1999 with reference to irrigation systems

Water Regulations for Domestic Gardens

Most people are unaware that there are legal requirements to take into consideration when connecting an irrigation system to a domestic garden tap. This simple guide provides you with the information you need to make sure you stay on the right side of the law!

 What you can connect to the mains water supply is regulated by an Act of Parliament - the Water Supply (Water Fittings) Regulations 1999; these regulations superceed the old water bylaws in England and Wales.

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DB Valves for garden irrigation systems

Permadrip compared to Porous Hoses

Porous hoses and ‘Leaky Pipe’ type drip systems are very popular; but are they as technically capable as commercial drip lines such as Permadrip?

Last hosepipe bans lifted

The last remaining hosepipe bans have now been lifted, allowing unrestricted irrigation once again.

One lesson from these restrictions has been the importance of planning ahead. Those clients who had efficient drip irrigation systems installed were able to continue to water, despite the bans.

For sports clubs, the watering restrictions under the new legislation came as a bit of a shock. Now is the time to start looking at capturing and storing rainwater from club roofs to ensure continuity of supply in future.

Anglian, Southern and Thames end their hosepipe ban

Anglian, Southern and Thames Water are to end thier hosepipe bans from midnight on 13th June, following the wet weather.

The four other water compaines: South East Water, Sutton and East Surrey Water, Veolia Water Central and Veolia Water Southeast have confirmed their hosepipe bans remain in place due to low levels of groundwater.

Thames Water now allowing watering of new planting

 

"Embattled landscaping, turf and gardening businesses were made exempt from the ‘hosepipe ban’ today after it was confirmed that record rainfall had reduced the severity of the ongoing water shortage in the South and East of England.

 

The adjustment to the Temporary Use Bans imposed by Thames Water and six other companies will allow gardening businesses to use hosepipes to water newly laid turf and plants, for up to 28 days."

Quoted from the Thames Water website. For the full information, click the link below.

Pozilock fittings - more secure than barbed fittings

Barbed fittings are a neat and low cost method of putting fittings into low pressure irrigation systems such as border drip lines.

Sports pitches now covered under Water Restrictions

Under previous 'hosepipe bans' only the washing of cars and the watering of domestic gardens was restricted. The 2012 restrictions however use new legislation that has been passed since the last drought. This widens the scope of the restrictions and now covers sports pitches that are not used for international matches.

These new restrictions will adversely affect club level rugby, football and bowls clubs.

Battery Controllers come of age

Only a few years ago, if you needed professional level reliability in an irrigation controller, then it was necessary to invest in a mains powered controller. Battery controllers were generally seen as being less reliable, only able to handle single watering zones.

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