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Inventories, net
3 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Inventories, net
Inventories, net

Inventories at March 31, 2019 and December 31, 2018 were as follows (in thousands):
 
March 31,
 
December 31,
 
2019
 
2018
Pipe and connectors, net of allowance of $21,508 and $21,270, respectively
$
16,958

 
$
18,026

Finished goods, net of allowance of $1,127 and $1,354, respectively
25,371

 
22,608

Work in progress
8,950

 
8,285

Raw materials, components and supplies
26,012

 
20,463

Total inventories, net
$
77,291

 
$
69,382