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Internal PVC Coupling Furniture Grade PVC Fitting

Internal PVC Coupling

Add length to an existing piece of PVC pipe easily with the FORMUFIT Internal Coupling. This coupling connects two Sch. 40 PVC pipe segments internally, with only a minuscule seam exposed. Internal Couplers are quintessential for breakpoints in larger applications and designs to help reduce transport size, or you can use them to create 10-foot lengths from our 40-inch or 60-inch PVC pipe segments without paying expensive freight.

Available Sizes

FORMUFIT PVC External Couplers are available to buy online in the 1/2", 3/4", 1", 1-1/4" PVC Sizes and fit standard Schedule 40 PVC size pipe only. For sizing information, please see our PVC 101 page.

Regular price $1.89
Sale price $1.89
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Unit price
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FORMUFIT 1/2" Internal Couplings in White connect two segments of 1/2 in. Schedule 40 PVC pipes internally, leaving a smooth, flush, and hidden connection. The best answer for when you need to exte...
Regular price $2.39
Sale price $2.39
Regular price
Unit price
per 
FORMUFIT 1/2" Internal Couplings in Black connect two segments of 1/2 in. Schedule 40 PVC pipes internally, leaving a smooth, flush, and hidden connection. The best answer for when you need to exte...
Regular price $2.39
Sale price $2.39
Regular price
Unit price
per 
FORMUFIT 1/2" Internal Couplings in Gray connect two segments of 1/2 in. Schedule 40 PVC pipes internally, leaving a smooth, flush, and hidden connection. The best answer for when you need to exten...
Regular price $2.49
Sale price $2.49
Regular price
Unit price
per 
FORMUFIT 1/2" Internal Couplings in Red connect two segments of 1/2 in. Schedule 40 PVC pipes internally, leaving a smooth, flush, and hidden connection. The best answer for when you need to extend...
Regular price $2.49
Sale price $2.49
Regular price
Unit price
per 
FORMUFIT 1/2" Internal Couplings in Orange connect two segments of 1/2 in. Schedule 40 PVC pipes internally, leaving a smooth, flush, and hidden connection. The best answer for when you need to ext...
Regular price $2.49
Sale price $2.49
Regular price
Unit price
per 
FORMUFIT 1/2" Internal Couplings in Yellow connect two segments of 1/2 in. Schedule 40 PVC pipes internally, leaving a smooth, flush, and hidden connection. The best answer for when you need to ext...
Sold Out
Regular price $2.49
Sale price $2.49
Regular price
Unit price
per 
FORMUFIT 1/2" Internal Couplings in Green connect two segments of 1/2 in. Schedule 40 PVC pipes internally, leaving a smooth, flush, and hidden connection. The best answer for when you need to exte...
Regular price $2.19
Sale price $2.19
Regular price
Unit price
per 
FORMUFIT 1/2" Internal Couplings in Blue connect two segments of 1/2 in. Schedule 40 PVC pipes internally, leaving a smooth, flush, and hidden connection. The best answer for when you need to exten...
Regular price $2.49
Sale price $2.49
Regular price
Unit price
per 
FORMUFIT 1/2" Internal Couplings in Purple connect two segments of 1/2 in. Schedule 40 PVC pipes internally, leaving a smooth, flush, and hidden connection. The best answer for when you need to ext...
Regular price $2.49
Sale price $2.49
Regular price
Unit price
per 
FORMUFIT 1/2" Internal Couplings in Pink connect two segments of 1/2 in. Schedule 40 PVC pipes internally, leaving a smooth, flush, and hidden connection. The best answer for when you need to exten...
Regular price $2.29
Sale price $2.29
Regular price
Unit price
per 
FORMUFIT 3/4" Internal Couplings in White connect two segments of 3/4 in. Schedule 40 PVC pipes internally, leaving a smooth, flush, and hidden connection. The best answer for when you need to exte...
Regular price $2.49
Sale price $2.49
Regular price
Unit price
per 
FORMUFIT 3/4" Internal Couplings in Black connect two segments of 3/4 in. Schedule 40 PVC pipes internally, leaving a smooth, flush, and hidden connection. The best answer for when you need to exte...
Sold Out
Regular price $2.49
Sale price $2.49
Regular price
Unit price
per 
FORMUFIT 3/4" Internal Couplings in Gray connect two segments of 3/4 in. Schedule 40 PVC pipes internally, leaving a smooth, flush, and hidden connection. The best answer for when you need to exten...
Regular price $2.79
Sale price $2.79
Regular price
Unit price
per 
FORMUFIT 3/4" Internal Couplings in Red connect two segments of 3/4 in. Schedule 40 PVC pipes internally, leaving a smooth, flush, and hidden connection. The best answer for when you need to extend...
Regular price $2.79
Sale price $2.79
Regular price
Unit price
per 
FORMUFIT 3/4" Internal Couplings in Orange connect two segments of 3/4 in. Schedule 40 PVC pipes internally, leaving a smooth, flush, and hidden connection. The best answer for when you need to ext...
Regular price $2.79
Sale price $2.79
Regular price
Unit price
per 
FORMUFIT 3/4" Internal Couplings in Yellow connect two segments of 3/4 in. Schedule 40 PVC pipes internally, leaving a smooth, flush, and hidden connection. The best answer for when you need to ext...
Sold Out
Regular price $2.79
Sale price $2.79
Regular price
Unit price
per 
FORMUFIT 3/4" Internal Couplings in Green connect two segments of 3/4 in. Schedule 40 PVC pipes internally, leaving a smooth, flush, and hidden connection. The best answer for when you need to exte...
Regular price $2.79
Sale price $2.79
Regular price
Unit price
per 
FORMUFIT 3/4" Internal Couplings in Blue connect two segments of 3/4 in. Schedule 40 PVC pipes internally, leaving a smooth, flush, and hidden connection. The best answer for when you need to exten...

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Additional Information

Internal PVC Coupler - Additional Information