Cold water loft tank - what ball valve?

[Pupp]

Header tank has started to drip from overflow and it looks like the inlet valve has calcified so that it no longer closes properly... am I correct in thinking I just ask for a 1/2 inch ball valve like in a traditional toilet cistern and that will be that or are there a million variations?

[Simpo Two]

High pressure (for mains water). Toilet cisterns are low pressure (gravity fed).

[fatboy b]

Simpo Two said:

High pressure (for mains water). Toilet cisterns are low pressure (gravity fed).

Not in our house. All cold water is mains (incl loos), apart from the power-shower feed.

[Deva Link]

Or mine, and my house is mid 60's.

I think it's a regional thing. My Mums house has tank fed bathroom water.

[Simpo Two]

As the OP has a gravity fed system I gave him the answer for his system.

[Deva Link]

Simpo Two said:

As the OP has a gravity fed system I gave him the answer for his system.

How can you tell that from his post?

You answer was right (it has to be mains pressure to the header tank) but the method of refilling the toilet cistern varies.

[essexplumber]

Deva Link said:

Simpo Two said:

As the OP has a gravity fed system I gave him the answer for his system.

How can you tell that from his post?

You answer was right (it has to be mains pressure to the header tank) but the method of refilling the toilet cistern varies.

Not always, could be open vented H/W but mains to C/W outlets, or he could be reffering to his C/H F&E tank! You want a brass body part 2 inlet valve btw OP. Oh and a 15mm fibre washer. Or you could get a firm in.

Edited by essexplumber on Tuesday 23 November 16:53

[Deva Link]

essexplumber said:

Deva Link said:

Simpo Two said:

As the OP has a gravity fed system I gave him the answer for his system.

How can you tell that from his post?

You answer was right (it has to be mains pressure to the header tank) but the method of refilling the toilet cistern varies.

Not always, could be open vented H/W but mains to C/W outlets, or he could be reffering to his C/H F&E tank! You want a brass body part 2 inlet valve btw OP. Oh and a 15mm fibre washer. Or you could get a firm in.

I'm confused now - which bit are you saying "not always" to?

My house has open vented H/W but mains to all C/W outlets. My mother's house has gravity cold water (to the bathroom). So I'm familiar with both possibilities.

My original point was to query how Simpo could tell the OP had gravity fed cold water so a different ball valve would be required than a toilet cistern one.

[essexplumber]

Deva Link said:

essexplumber said:

Deva Link said:

Simpo Two said:

As the OP has a gravity fed system I gave him the answer for his system.

How can you tell that from his post?

You answer was right (it has to be mains pressure to the header tank) but the method of refilling the toilet cistern varies.

Not always, could be open vented H/W but mains to C/W outlets, or he could be reffering to his C/H F&E tank! You want a brass body part 2 inlet valve btw OP. Oh and a 15mm fibre washer. Or you could get a firm in.

I'm confused now - which bit are you saying "not always" to?

My house has open vented H/W but mains to all C/W outlets. My mother's house has gravity cold water (to the bathroom). So I'm familiar with both possibilities.

My original point was to query how Simpo could tell the OP had gravity fed cold water so a different ball valve would be required than a toilet cistern one.

Sorry Deva that response was to Simpo not you (rubbish at quoting).

[BliarOut]

You'll need a ttting long spanner too as the fitting will probably have calcified and you can't hit it in case the plastic tank breaks. I lifted my daughter clear of the deck when she was trying to hold one of the spanners for me

[Simpo Two]

Deva Link said:

Simpo Two said:

As the OP has a gravity fed system I gave him the answer for his system.

How can you tell that from his post?

Because I also have a header tank and had exactly the same problem a few years ago. I thought the chances of a gravity-fed house having mains-fed toilets were pretty slim.

[F i F]

When my cold tank started dripping through the overflow I fitted one of [ul]these|http://www.diy.com/diy/jsp/bq/nav.jsp?action=detail&fh_secondid=9270902&fh_view_size=150&fh_location=//catalog01/en_GB&fh_search=cistern&fh_eds=ß&fh_refview=search&ts=1287495459922&isSearch=true&ecamp=aff-p9-awin-001[/url]

Apart from a couple of days when it made a slight groaning noise whenever the valve opened it's been ace, and now completely silent including the fill.

Copes with water flow when running a bath and a power shower.