Drilling your own well makes more sense

New Ross Standard - - NEWS -

FOR many new home builders who don’t have easy ac­cess to mains water, the only av­enue open to them is to bore a water well be­fore pro­ceed­ing with their build­ing pro­gramme. Water is one of the most use­ful and valu­able re­soruces, and for­tu­nately is ex­tremely abun­dant in Ire­land, with the most ob­vi­ous sources in the coun­try­side in the lakes and streams. Be­ing able to source your own water now makes more eco­nomic sense.

How­ever some of th­ese sources have se­ri­ous draw­backs as fresh water sup­plies be­cause of haul­ing costs, al­gae, dirty coloura­tion and the dan­ger of po­lu­tion. Thank­fully there is a large amount of water un­der­neath our feet in the ground. Be­ing hid­den it is con­sid­ered some­what mys­te­ri­ous by many, but ground­wa­ter has many ad­van­tages over other re­sources be­cause of its free­dom from con­tam­i­na­tion, lo­cal avail­ablity and low con­stant tem­per­a­ture.

A water well is any hole dug into the earth which reaches the water ta­ble for the pur­pose of ex­tract­ing water. Strictly speak­ing, a dugout which in­ter­sects the water-ta­ble is there­fore a well. Gen­er­ally how­ever, we think of wells as be­ing a few inches to a few feet in di­am­e­ter.

No drilled well should be less than six inches in di­am­e­ter, be­cause smaller ones se­ri­ously limit pro­duc­tion and make re­pairs and ser­vic­ing of pump­ing equip­ment very dif­fi­cult. Above the min­i­mum size, dou­bling the di­am­e­ter only in­creases well yield by 15 to 25%. Hence for the quan­ti­ties of water needed by most farm­ers and do­mes­tic users, a well should rarely need to be over six inches in di­am­e­ter, but for in­dus­trial users, a well needs to be much larger.

Two types Wells are drilled into two types or aquifers: water ta­ble and arte­sian. A water ta­ble well pen­e­trates an aquifer whose lower sur­faces is rel­a­tively im­per­me­able con­fin­ing the bed, and whose up­per sur­face is the water ta­ble it­self.

When pump­ing low­ers the water level of the well, the water ta­ble drops in its vicin­ity. An arte­sian well does not nece­sar­rly flow, con­trary to pop­u­lar thought. It pen­e­trates an aquifer whose up­per and lower bound­aries are both con­fin­ing beds. Water ta­ble wells are usu­ally shal­low and more sus­cep­ti­ble to con­tam­i­na­tion, but their yield is fre­quently greater than from arte­sian wells.

Ac­cess In se­lect­ing the site for your well, con­ve­nience of ac­cess should be con­sid­ered. Also re­mem­ber that wells in low ar­eas do not have to be as deep as those on knolls. Avoid drilling down near, barns, priv­ies or sep­tic tanks. Th­ese can read­ily pol­lute a water sup­ply. As­sur­ing the pu­rity of well water should be the most im­por­tant con­sid­er­a­tion.

Sub­mersible

Also re­mem­ber the most sat­is­fac­tory pump for a bore­hole is the sub­mersible type, which in­volves no suc­tion pipe or foot valve. Sizes range from 1.3 horse power to 100 h.p. and give vol­umes and pres­sure suit­able for needs rang­ing from pri­vate houses to fac­to­ries. Pumps can be in­stalled to op­er­ate au­to­mat­i­cally, us­ing a client’s ex­ist­ing pipework and with pres­sure to suit in­di­vid­ual re­quire­ments.

Ex­tract­ing water

O’Rourke Water Well Drilling.

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