fuel tank (1988 230TE)

hi anybody familiar with fuel line arrangements on 230te type fuel tanks? I was just taking out the petrol tank to fix a pinhole leak in the filler neck.....
unfortunately the top one of the three lines coming out of the tank turns out to be rusted through and parts company with... - well that's the question! The pipe disappears up into a block of rubber in the body, can't see where it goes. Any one know what the pipe is, where it goes, tips for replacing and so forth?
TIA
cheers!
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

returns excess fuel to the tank from the injector? Would there be any harm in replacing the rotten end bit of pipe with an extended rubber hose, assuming the rust is as localised as it appears? Need to get the tank out and have a better look but got rained off this afternoon (plus a face-full of petrol...) but was hoping for any insights or experiences.
Ta again
cheers!
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.