Square Top Valve Box and Lid Usage The square top fits inside a 6" pipe cut to length to form an adjustable box. An 8" pipe fits outside for the same use. The square top comes with a choice of two lids either a raised or recessed "W", box and lids sold separately. Item Number / Description 130 Square Top Box Only 131 Square Top Cover Only Recessed "W" 132 Square Top Cover Only Raised "W" Item #130-132