Method of sealing a sump

Abstract

A method of lining a sump includes applying an elastomeric material to a surface of the sump by spraying the elastomeric material onto a surface of the sump whereby a continuous elastomeric coating is formed on the surface. An effective spray-on polymer is a polyurethane polymer. The sump walls may be partially or wholly coated.

1 . A method of lining a plastic sump comprising the steps of: 
 re-treating a surface of the plastic sump;    applying an elastomeric material to the pre-treated a surface of the sump by spraying the elastomeric material onto the a surface of the sump wherein a continuous elastomeric coating is formed on the surface; and    allowing the elastomeric coating to cure, whereby an elastomeric liner is formed on the surface to seal the sump.    
   
   
       2 . A method of lining a sump as described in  claim 1 , wherein the pre-treating step comprises mechanical roughing of the surface.  
   
   
       3 . A method of lining a sump as described in  claim 1 , wherein the pre-treating step comprises heating of the surface.  
   
   
       4 . A method of lining a sump as described in  claim 2 , wherein the pre-treating step further comprises heating of the surface.  
   
   
       5 . A method of lining a sump as described in  claim 4 , wherein the step of heating the surface precedes the step of roughing of the surface.  
   
   
       6 . A method of lining a sump as described in  claim 1 , wherein the elastomeric material is a polyurethane polymer.  
   
   
       7 . A method of lining a sump as described in  claim 1 , wherein the resulting elastomeric coating has a thickness of from about ⅛ inch to about ¼ inch.  
   
   
       8 . A method of lining a sump as described in  claim 1 , wherein the spraying step comprises spraying the elastomeric material over substantially the entire interior surface of the sump.  
   
   
       9 . A method of lining a sump as described in  claim 1 , wherein the spraying step comprises spraying the elastomeric material over substantially the entire exterior surface of the sump.  
   
   
       10 . An assembly including a plastic sump and a coating, the assembly comprising: 
 a plastic sump having sidewalls and forming part of an underground piping system and comprising an opening in the sidewall for permitting passage of a pipe;    a sprayed-on elastomeric coating on at least a portion of the sidewall comprising an opening therein;    wherein the elastomeric coating forms a seal around the opening to create a fluid tight chamber within the sump.    
   
   
       11 . An assembly as described in  claim 10 , wherein the sump comprises a plurality of openings adapted to permit passage of a plurality of pipes.  
   
   
       12 . An assembly as described in  claim 10 , wherein the elastomeric coating covers substantially the entire inside surface of the sidewalls of the sump.  
   
   
       13 . An assembly as described in  claim 10 , wherein the thickness of the coating is from about ⅛ inch to about ¼ inch.  
   
   
       14 . An assembly as described in  claim 10 , wherein the elastomeric coating is a polyurethane polymer.