Found this at
http://www.kidney.org.uk/Medical-Info/pd/pdproblems.html:
Catheter/Drain Problems
Leak of PD fluid: In most people, the ‘seal’ around the catheter exit site (where the catheter leaves the abdomen) works properly. PD fluid drains in and out of the abdomen through the tube without any leakage. However, in some people, the PD fluid leaks out around the catheter, wetting the dressing over the exit site.
If a leaking catheter is ‘rested’ (not used for dialysis) for 2 to 4 weeks, it will usually ‘seal up’ again, and become watertight. Occasionally, however, a leak may recur even if the catheter is rested. It may then be necessary to have an operation to take out the leaking catheter. A new catheter, at a different site, is usually put in during the same operation.