diff --git a/warcprox/dedup.py b/warcprox/dedup.py
index 7e19150..c75f6c3 100644
--- a/warcprox/dedup.py
+++ b/warcprox/dedup.py
@@ -42,7 +42,7 @@ class DedupableMixin(object):
         self.min_text_size = options.dedup_min_text_size
         self.min_binary_size = options.dedup_min_binary_size
 
-    def is_dedupable(self, recorded_url):
+    def should_dedup(self, recorded_url):
         """Check if we should try to run dedup on resource based on payload
         size compared with min text/binary dedup size options. Return Boolean.
         """
@@ -60,11 +60,12 @@ class DedupLoader(warcprox.BaseStandardPostfetchProcessor):
         decorate_with_dedup_info(
                 self.dedup_db, recorded_url, self.options.base32)
 
-class DedupDb(object):
+class DedupDb(DedupableMixin):
     logger = logging.getLogger("warcprox.dedup.DedupDb")
 
     def __init__(
             self, file='./warcprox.sqlite', options=warcprox.Options()):
+        DedupableMixin.__init__(self, options)
         self.file = file
         self.options = options
 
@@ -127,7 +128,7 @@ class DedupDb(object):
 
     def notify(self, recorded_url, records):
         if (records and records[0].type == b'response'
-                and recorded_url.response_recorder.payload_size() > 0):
+                and self.should_dedup(recorded_url)):
             digest_key = warcprox.digest_str(
                     recorded_url.payload_digest, self.options.base32)
             if recorded_url.warcprox_meta and "captures-bucket" in recorded_url.warcprox_meta:
@@ -150,10 +151,11 @@ def decorate_with_dedup_info(dedup_db, recorded_url, base32=False):
             recorded_url.dedup_info = dedup_db.lookup(
                 digest_key, url=recorded_url.url)
 
-class RethinkDedupDb(DedupDb):
+class RethinkDedupDb(DedupDb, DedupableMixin):
     logger = logging.getLogger("warcprox.dedup.RethinkDedupDb")
 
     def __init__(self, options=warcprox.Options()):
+        DedupableMixin.__init__(self, options)
         parsed = doublethink.parse_rethinkdb_url(options.rethinkdb_dedup_url)
         self.rr = doublethink.Rethinker(
                 servers=parsed.hosts, db=parsed.database)
@@ -204,7 +206,7 @@ class RethinkDedupDb(DedupDb):
 
     def notify(self, recorded_url, records):
         if (records and records[0].type == b'response'
-                and recorded_url.response_recorder.payload_size() > 0):
+                and self.should_dedup(recorded_url)):
             digest_key = warcprox.digest_str(
                     recorded_url.payload_digest, self.options.base32)
             if recorded_url.warcprox_meta and "captures-bucket" in recorded_url.warcprox_meta:
@@ -299,7 +301,7 @@ class CdxServerDedupLoader(warcprox.BaseBatchPostfetchProcessor, DedupableMixin)
         recorded_url = self.inq.get(block=True, timeout=0.5)
         if (recorded_url.response_recorder
                 and recorded_url.payload_digest
-                and self.is_dedupable(recorded_url)):
+                and self.should_dedup(recorded_url)):
             self.batch.add(recorded_url)
             self.pool.submit(self._process_url, recorded_url)
         else:
@@ -321,9 +323,10 @@ class CdxServerDedupLoader(warcprox.BaseBatchPostfetchProcessor, DedupableMixin)
             if self.outq:
                 self.outq.put(recorded_url)
 
-class BatchTroughStorer(warcprox.BaseBatchPostfetchProcessor):
+class BatchTroughStorer(warcprox.BaseBatchPostfetchProcessor, DedupableMixin):
     def __init__(self, trough_dedup_db, options=warcprox.Options()):
         warcprox.BaseBatchPostfetchProcessor.__init__(self, options)
+        DedupableMixin.__init__(self, options)
         self.trough_dedup_db = trough_dedup_db
 
     def _filter_and_bucketize(self, batch):
@@ -335,7 +338,7 @@ class BatchTroughStorer(warcprox.BaseBatchPostfetchProcessor):
         for recorded_url in batch:
             if (recorded_url.warc_records
                     and recorded_url.warc_records[0].type == b'response'
-                    and recorded_url.response_recorder.payload_size() > 0):
+                    and self.should_dedup(recorded_url)):
                 if (recorded_url.warcprox_meta
                         and 'captures-bucket' in recorded_url.warcprox_meta):
                     bucket = recorded_url.warcprox_meta['captures-bucket']
@@ -367,9 +370,10 @@ class BatchTroughStorer(warcprox.BaseBatchPostfetchProcessor):
                 logging.warn(
                     'timed out saving dedup info to trough', exc_info=True)
 
-class BatchTroughLoader(warcprox.BaseBatchPostfetchProcessor):
+class BatchTroughLoader(warcprox.BaseBatchPostfetchProcessor, DedupableMixin):
     def __init__(self, trough_dedup_db, options=warcprox.Options()):
         warcprox.BaseBatchPostfetchProcessor.__init__(self, options)
+        DedupableMixin.__init__(self, options)
         self.trough_dedup_db = trough_dedup_db
 
     def _startup(self):
@@ -384,7 +388,7 @@ class BatchTroughLoader(warcprox.BaseBatchPostfetchProcessor):
         for recorded_url in batch:
             if (recorded_url.response_recorder
                     and recorded_url.payload_digest
-                    and recorded_url.response_recorder.payload_size() > 0):
+                    and self.should_dedup(recorded_url)):
                 if (recorded_url.warcprox_meta
                         and 'captures-bucket' in recorded_url.warcprox_meta):
                     bucket = recorded_url.warcprox_meta['captures-bucket']
@@ -444,7 +448,7 @@ class BatchTroughLoader(warcprox.BaseBatchPostfetchProcessor):
                 logging.warn(
                     'timed out loading dedup info from trough', exc_info=True)
 
-class TroughDedupDb(DedupDb):
+class TroughDedupDb(DedupDb, DedupableMixin):
     '''
     https://github.com/internetarchive/trough
     '''
@@ -461,6 +465,7 @@ class TroughDedupDb(DedupDb):
                       'values (%s, %s, %s, %s);')
 
     def __init__(self, options=warcprox.Options()):
+        DedupableMixin.__init__(self, options)
         self.options = options
         self._trough_cli = warcprox.trough.TroughClient(
                 options.rethinkdb_trough_db_url, promotion_interval=60*60)
@@ -533,7 +538,7 @@ class TroughDedupDb(DedupDb):
 
     def notify(self, recorded_url, records):
         if (records and records[0].type == b'response'
-                and recorded_url.response_recorder.payload_size() > 0):
+                and self.should_dedup(recorded_url)):
             digest_key = warcprox.digest_str(
                     recorded_url.payload_digest, self.options.base32)
             if recorded_url.warcprox_meta and 'captures-bucket' in recorded_url.warcprox_meta: