Pipe Couplings

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MERRILL COUPLINGS

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Compare Merrill couplings using the details that matter most for your drop pipe installation.

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Comparison of five Merrill drop pipe couplings
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Couplings
MOST COMMON Merrill PDC Schedule 80 PVC drop pipe coupling

PDC

Sch. 80 PVC

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MORE STRENGTH Merrill PDCH Schedule 120 PVC drop pipe coupling

PDCH

Sch. 120 PVC

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STANDARD STAINLESS Merrill SSMC merchant stainless drop pipe coupling

SSMC

Merchant Stainless

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HEAVY DUTY Merrill SSDC heavy-wall stainless drop pipe coupling

SSDC

Heavy-Wall Stainless

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MAXIMUM STRENGTH Merrill SSDCHD extra-heavy stainless drop pipe coupling

SSDCHD

Extra Heavy Stainless

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Why Choose It? Simple, cost-effective choice for most residential well systems. More wall thickness and strength when standard PVC is not enough. Stainless option when corrosion resistance matters without moving to a heavy-wall coupling. Heavy-wall stainless for added strength and long-term durability. Maximum-strength stainless option for the most demanding installations.
Best For? Typical residential wells using threaded PVC drop pipe. Deeper wells, heavier pumps and higher-load PVC drop-pipe applications. General well applications calling for a standard stainless coupling. Heavier-duty well systems where strength and corrosion resistance both matter. Deep wells, heavy loads and demanding drop-pipe applications.
Strength / Duty Standard dutySchedule 80 PVC Extra heavy dutySchedule 120 PVC Standard stainlessMerchant coupling Heavy dutyHeavy-wall stainless steel Extra heavy dutyExtra-heavy-wall stainless steel
Durability / Corrosion Corrosion-resistant PVC; lightweight and will not rust. Corrosion-resistant PVC with a thicker wall for added strength. 304 stainless steel for corrosion resistance and reliable service life. 304 stainless steel with heavy-wall construction for demanding service. 304 stainless steel with extra-heavy wall construction for maximum durability.
Fits 1", 1-1/4" NPT 1", 1-1/4", 1-1/2", 2" NPT 1", 1-1/4", 1-1/2", 2" NPT 1", 1-1/4", 1-1/2", 2" NPT 1", 1-1/4", 1-1/2", 2" NPT