Ask The Trades - Print Page

Ask The Trades
https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Plumbing Questions >> Which type of zone valve ? https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1111624510 Message started by molerat on Mar 24^th, 2005, 12:35am

Title: Which type of zone valve ?
Post by molerat on Mar 24^th, 2005, 12:35am

My 20 year old Sunvic zone valves are dieing of old age so am about to replace them. Which type are best for reliability and total lifespan, the rotating valve type as in Sunvic etc or the ball type like Honeywell, or are they much the same ?

Title: Re: Which type of zone valve ?
Post by PEDANTICVINDICTIVEMAN on Mar 24^th, 2005, 7:03am

The rubber ball type are best in my opinion, but you may find your Sunvics need power to close whereas ball types are shut manually by a spring, so you may find it dificult to sort out on the wiring front

Title: Re: Which type of zone valve ?
Post by molerat on Mar 24^th, 2005, 8:36am

Thanks for your opinion. My old ones are spring return so no problems there. :)

Title: Re: Which type of zone valve ?
Post by billythekid on Mar 24^th, 2005, 12:45pm

I agree with PVM, in my opinion can't beat the Honeywell stuff. Easy to replace parts on too when the motor gives up.

btk

Title: Re: Which type of zone valve ?
Post by Stoday on Mar 30^th, 2005, 1:13am

Sunvic make two types.

One which needs power to hold it open, as others do, & uses a spring to close when the power is turned off. TTo operate this, you only need a programmer/thermostat with a normally open contact.

The other only uses power when it opens or closes; it does not use energy to hold it open. Needs a changeover contact to operate.