Outdoor tap question

[Madmart20]

Hi all,

I'm looking for some advice about my exterior tap; it has a 24mm exterior thread, which as I'm sure you all know isn't a standard thread size for Hozelock-type hose connectors. I've been able to get by with a connector for round ended taps (the type with the jubilee clip around the end) but it leaks everywhere while the tap is in use and doesn't get the best connection between the hose and the connector.

I have got hold of the Hozelock adaptor for indoor threaded taps and waiting for a dry moment to get it on the tap, but in case that doesn't work, does anyone know how I could get round this?

 

[Swwils]

You can get 24mm fine thread to 3/4 BSP adaptors.

 

[Madmart20]

You can get 24mm fine thread to 3/4 BSP adaptors.

I assume that would have an interior thread to screw on to the tap and an exterior for the adaptor?

Where can I get these from?

 

[JohnD]

can you post some pics of the tap, and a ruler or measure held across the diameter of this screw fitting?

it is much more likely to be a BSP thread. Unless it is a foreign import?

BSP size names bear no apparent relation to their measurements.


3/8 Inch BSP 16.66 mm / 0.656" diameter, 19 tpi
1/2 Inch BSP 20.99 mm / 0.825" 14
5/8 Inch BSP 22.99 mm / 0.902" 14
3/4 Inch BSP 26.44 mm / 1.041" 14

https://en.wikipedia.org/wiki/British_Standard_Pipe#Pipe_thread_sizes

 

[Madmart20]

can you post some pics of the tap, and a ruler or measure held across the diameter of this screw fitting?

it is much more likely to be a BSP thread. Unless it is a foreign import?

BSP size names bear no apparent relation to their measurements.


3/8 Inch BSP 16.66 mm / 0.656" diameter, 19 tpi
1/2 Inch BSP 20.99 mm / 0.825" 14
5/8 Inch BSP 22.99 mm / 0.902" 14
3/4 Inch BSP 26.44 mm / 1.041" 14

https://en.wikipedia.org/wiki/British_Standard_Pipe#Pipe_thread_sizes

It was fitted by my grandad years ago, and I have no idea where he got it; it could have been in a skip for all we know - he wasn't one for spending money when he didn't have to, which has caused no end of cursing over the years!

I've measured the exterior diameter of the thread - it comes out as 23mm (accuracy may be a factor; I closed an adjustable wrench around the thread and measured the gap between the jaws). The tap looks like this:

A close up of the thread:

 

[JohnD]

this tap is stamped 1/2" and a British Standard kitemark

I bet you 50p it is not a metric thread.

it might possibly be tapered.

if your measurement is accurate, the spout might be 5/8 Inch BSP (22.99 mm) / 0.902" 14 threads per inch

you need to hold your measure up against it.

 

[Madmart20]

this tap is stamped 1/2"

I bet you 50p it is not a metric thread.

Wouldn't surprise me...

Any ideas as to how the devil I'm going to attach a hose connector to that thing? I am not enthusiastic about getting a new tap put in as that wall is ... well, given what I said about my grandad's reluctance to spend money, God alone knows what's going on behind that wall...

 

[JohnD]

look for a 5/8" garden tap adaptor

 

[JohnD]

Found one.

https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=5/8"+garden+tap+adaptor&_sacat=0

and another

https://www.ebay.co.uk/itm/164566644108?_trkparms=ispr=1&hash=item2650efb58c:g:sF8AAOSwYKZfbffy&amdata=enc:AQAFAAACkBaobrjLl8XobRIiIML1V4Imu%2Fn%2BzU5L90Z278x5ickkfOCvCjTOBWK8pwriaolq5j8GKPQDRCpRYLGfiFDUvGRRfVBg8lFpKLpZ%2BKkk7sFja91lio%2BoS6EYMAdtVV7JNMw4EUFiX0v2JodTWSvMCzmUkhKmpqn%2FfDfyk6HJqLYqOnjqSYZXeYMJcLFT52bylF3fG89gRWRXjyNMAjzeW6rFDbLqLn1k%2FPdEFAx83vo2rQm3ppAWIm4pgQWg5oLQjkkha8VBciwZpuBdpTtD9kaBgzAV3xQNNCGPh5s1bM71fIdsTG4WF%2BCHX6xBOfRQtzpzF9e1h7STxqt%2FpXd0SN8ecqgXK%2Bd8vwCx9hb%2BeuV7oltVRpPxHSLeDBV4CI6tYAFaF0S7biCyeHymTYb9G7Ei%2F3nFx2SBViO8Z4Zw7oFBL9bR5h3oRw81tfp3BeEfIPDCN4BNQk8iWeiPrxc%2FK%2Bj22gbtw2TlH3IRK0tBdJnjhsZp8tNdiltGcRXuHRvlh8CqDwQVFPXMhDvWBH%2Few12TosQlbT%2FZc1dZBpurDRFqpzO446deVpuy5tRNazz8cHVQCU3QtQ0gwhKmXlxFYojoOtgXH1UVUA%2FgzXicQY36WJfLxBVP7dcM58Rpoc4o0uMD076JL6LqQZt1n47OfkneLIges%2FMO3PZnnGQLpy4YDEApg52CZccs0tu2%2BKuPlXh95rZrgHS%2BkWzBS2jcjUorMmNnsSXZWme%2FwlIh3C2bxvWi5HOI0lrXb0VqJzZ8%2Fi%2B6yHT0pcsrBxDjSOWVh7PSmRpAwseNIOIAJDyJRi1D44M3UQf4jZ6BKk5eZKO7XtuTEEnTMj87vTVXNztcrzS8BVj5XrANxQ918ABg%2B2H2|cksum:164566644108cb5791124a5f4289a085f72bb48651ab|ampidL_CLK|clp:2334524

Brass ones are more durable than plastic
https://www.ebay.co.uk/itm/154053121756?hash=item23de4816dc:g:b0MAAOSwpo9fPqT4

But I can't help thinking 3/4" BSP is more common, so check again. 26.44 mm

If you already tried a 3/4" and it was really loose, go for 5/8"

if it is a bit loose, use PTFE tape on the thread.

 

[Nige F]

3/4 is more common but, as John D has found a 5/8 by 3/4 is available ( I didn't know that ) you've got a 5/8 on the tap deffo.

 

[Madmart20]

So in conclusion I should look for a hose connector with a 5/8" thread?

 

[Nige F]

The adapter John linked to will convert to 3/4 and then it will be the modern standard -

 

[JohnD]

yes

it will screw onto the spout of the tap

I'd go for one with the hozelock-style quick-release spigot.

Plastic ones often come in yellow and black plastic, the black part is a 1/2" reducing adaptor screwed into the yellow 5/8" socket, or a 5/8" screwed into a 3/4", so you can just unscrew the bit you don't need. Fit a brass one when the plastic one breaks

 

[Madmart20]

Thank you to all commenters for your advice, and I can now report that a trip to a plumbing supplier's website netted me a 5/8" converter which is now happily seated on my tap, and a 3/4" brass connector is now holding the hose connector firmly in place. Job done!