Leak in passenger side footwell RHD

[Spyderromeo]

I am sure this is a well known problem. I have had several proposal to cure it.

The fault occurred when I turned off the Air con so suspect melt from A/C condenser, it shows up as two streams of water dripping on either side of footwell, and is influenced by the motion of the car on bends.  I have been told that there are drain valves on to tray that collects water when A/C is defrosted. The valve is called the duckbill, and I think from my Triumph days we called it the Phart valves but I bet they are the same, Triumphs being relatively unsophisticated cars were easy to get at, because they didn't have much to get in the way . I have even found a VIN number which after this the fault is supposedly cured. The description I read said they were very difficult to get at. My workshop guy who is off work at he moment, heart plumbing! say's it is easy but you need to get up on a 4 pillar lift and poke something up the tube.

With solutions like this, my hope is  that you guy's have an easy solution. Any suggestions and full descriptions of methods would be gratefully received. 

Spyderromeo 

[Jimbov8]

1 hour ago, Spyderromeo said:

I am sure this is a well known problem. I have had several proposal to cure it.

The fault occurred when I turned off the Air con so suspect melt from A/C condenser, it shows up as two streams of water dripping on either side of footwell, and is influenced by the motion of the car on bends.  I have been told that there are drain valves on to tray that collects water when A/C is defrosted. The valve is called the duckbill, and I think from my Triumph days we called it the Phart valves but I bet they are the same, Triumphs being relatively unsophisticated cars were easy to get at, because they didn't have much to get in the way . I have even found a VIN number which after this the fault is supposedly cured. The description I read said they were very difficult to get at. My workshop guy who is off work at he moment, heart plumbing! say's it is easy but you need to get up on a 4 pillar lift and poke something up the tube.

With solutions like this, my hope is  that you guy's have an easy solution. Any suggestions and full descriptions of methods would be gratefully received. 

Spyderromeo 

This thread has a load of info with pictures on how to fix it without having to remove the dash.

https://www.jaguarforums.com/forum/xk-xkr-x150-33/c-drain-duck-bill-fix-my-solution-149349/

[Spyderromeo]

On 9/16/2025 at 1:38 PM, Jimbov8 said:

This thread has a load of info with pictures on how to fix it without having to remove the dash.

https://www.jaguarforums.com/forum/xk-xkr-x150-33/c-drain-duck-bill-fix-my-solution-149349/

Hi Jim

Yep there are loads and loads of posts about this little baby, and it seem like everybody has had a go at it in one way or another. But loads of failures. I am going to try the close all the vents try to build up pressure (not sure where from) also  I have also ordered a endoscope from Temu £14.88 colour 4.31 inch screen how can we compete with that !! and if the air pressure doesn't work I will try the scalpel on the end of a pencil  method, there are also some methods which use silicon liquid or gel but you need adult verification to use this method. 

As an aside (I just received a 12 piece 1/2 socket set just to fit my torque wrench from Temu the quality is good, not snap-on good but it has a good ratchet, 10 sockets up to 24mm, and a extension piece, and it came in a metal case including postage for £5.81, and was here in 4 days). Brand new special offer you can buy a brand new SpaceX rocket to take you to the moon for just over £50 !! Who would be in manufacturing. 

Will let you all know what works best (may take a week of two).

Spyderromeo