An U.S.A. Corporation

Textable Ordering

Square Monitoring Well Manholes

2" Locking "J" Plug         $   6.90          BUY ON-LINE

4" Locking "J" Plug         $   9.00          BUY ON-LINE  

6" Locking "J" Plug         $ 29.98          BUY ON-LINE

1", 3" & 5" Available Upon Request - See Form Below

Lockable Monitoring Well Caps

Environmental monitoring manholes are protectors used where surface protection is needed, but access must be maintained to service the monitoring well it protects. We offer Royer Aluminum manholes for smaller diameter monitoring environmental wells, and we offer the Morrison Bros manholes for use on 2" or larger wells in 8 inch, 12 inch and 18 inch round bolt down lid monitoring manholes.


Standard Features:

+ Large clean-out surface around the bolts
+ Locating tab for ease of bolt alignment
+ "Monitoring Well" cast into cover
+Easy to replace gaskets without tools or glue
+API 615 equilateral triangle cast into cover

Construction Details:    418XA
+Bolts: Stainless hex head
+ Gasket: Buna-N
+Cover: Cast iron
+ Ring: Cast iron
+ Skirt: 22 gauge galvanized steel
+ Meets H-20 Loading Requirements

Royer's 2 piece Aluminum locking monitoring well caps are for use in securing above ground protective risers on monitoring well locations. The bottom half of the cap secures to the riser casing with Allen head screws. The top half slides over the bottom flange covering the Allen screws and making them un-accessible. With the top half over the bottom, they can have a padlock installed to secure the well. These locking well caps are not water tight.

NOTE:  These are for monitoring wells. They are not for water wells with a submersible pump installed in the well. These caps do not provide a port for bringing pump wire out through.


418XA-0900 AM      8" x 12" Manhole    $   76.05      BUY ON-LINE  

418XA-0400 AM    12" x 12" Manhole    $  109.00      BUY ON-LINE 

418XA-1000 AM    18" x 12" Manhole    $  223.50      BUY ON-LINE 

4SLW-6                  4" x   6" Manhole    
$   45.50      BUY ON-LINE
6SLW-6                  6" x   6" Manhole    $   60.50      BUY ON-LINE

Lockable Monitoring Well "J" Plugs

24" x 24"  w/ 12" Skirt     $379.00      BUY ON-LINE
24" x 24"  w/ 24" Skirt     $379.00      BUY ON-LINE


4-1/2"    for      4" Nom. Casing      $  44.45      BUY ON-LINE  

6-5/8"    for      6" Nom. ​Casing      $  60.45      BUY ON-LINE 
8-3/4"    for      8" Nom. ​Casing      $  77.85      BUY ON-LINE
10-3/4"  for     10" Nom. Casing      
$  94.00      BUY ON-LINE

2-3/8",  3-1/2",  5-5/8",  10-3/4",  12-3/4"  Available Upon Request - Call For Pricing

Standard Features

  • H-20 load rating
  • Bolt down cover with gasket
       resists surface water
  • All welded construction

Construction Details

  • Cover: 3/8″ four-way steel floor
  • Sides: 14 gauge steel
  • Gasket: Buna-N 

These Limited Access Environmental Manholes are offered in 8", 12", and 18" sizes, feature a clearly marked "Monitoring Well" designation which distinguishes them from a standard product fill manhole. These monitoring manholes feature a heavy duty cast iron cover and ring, a fuel resistant gasket to make them watertight, and a heavy galvanized steel skirt to maintain an open area below the lid to work. Two stainless steel bolts are used to secure the lid, limiting access to the monitoring well below. These manholes are traffic rated at 8,000 lbs per tire and conform to H-20 ratings. 

Construction Details:    SLW

Monitoring Well Manholes

Secured Lid Watertight