Our XL PETaPOTTY is the smallest in the Heavy Dudy line of industrial strength PETaPOTTYs. Perfect for large dogs, lofts, common areas, doggy day cares, groomers, dog walks and dog parks, the XL PETaPOTTY is 4' by 4' of green potty space and stands 6" high. Our revolutionary Heavy Dudy drainage system includes a valve which flushes all water and liquid waste straight into the floor drain. Use of the valve is purely optional. If no ground drain is available we also suggest using a gravel pump to suck water and urine out of pan into a bucket for disposal. If drainage valve and system is used then a 7/8" hole must be drilled by customer because of the specific demensions which vary from home to home. XL PETaPOTTY 4X4 with Dog Sod $1,099.99 Single Piece for the XL PETaPOTTY 4'X4' $91.99 PETaPOTTY Hydrants $129.99 SMELL'U'LATOR $17.99