diff --git a/src/ca/repeaterSubscribeTimer.cpp b/src/ca/repeaterSubscribeTimer.cpp
index c1775c6f9..193ba4594 100644
--- a/src/ca/repeaterSubscribeTimer.cpp
+++ b/src/ca/repeaterSubscribeTimer.cpp
@@ -30,7 +30,7 @@ repeaterSubscribeTimer::repeaterSubscribeTimer ( udpiiu &iiuIn, epicsTimerQueue
 
 repeaterSubscribeTimer::~repeaterSubscribeTimer ()
 {
-    this->timer.getQueue().destroyTimer ( this->timer );
+    this->timer.destroy ();
 }
 
 epicsTimerNotify::expireStatus repeaterSubscribeTimer::expire ( const epicsTime & currentTime )
diff --git a/src/ca/searchTimer.cpp b/src/ca/searchTimer.cpp
index 11c7021b2..ce5a421a5 100644
--- a/src/ca/searchTimer.cpp
+++ b/src/ca/searchTimer.cpp
@@ -57,7 +57,7 @@ searchTimer::searchTimer ( udpiiu &iiuIn, epicsTimerQueue &queueIn, epicsMutex &
 
 searchTimer::~searchTimer ()
 {
-    this->timer.getQueue().destroyTimer ( this->timer );
+    this->timer.destroy ();
 }
 
 //
diff --git a/src/ca/tcpRecvWatchdog.cpp b/src/ca/tcpRecvWatchdog.cpp
index 8618281f7..192dd9fa9 100644
--- a/src/ca/tcpRecvWatchdog.cpp
+++ b/src/ca/tcpRecvWatchdog.cpp
@@ -28,7 +28,7 @@ tcpRecvWatchdog::tcpRecvWatchdog
 
 tcpRecvWatchdog::~tcpRecvWatchdog ()
 {
-    this->timer.getQueue().destroyTimer ( this->timer );
+    this->timer.destroy ();
 }
 
 epicsTimerNotify::expireStatus tcpRecvWatchdog::expire ( const epicsTime & /* currentTime */ )
diff --git a/src/ca/tcpSendWatchdog.cpp b/src/ca/tcpSendWatchdog.cpp
index bc07355cb..4ff1c69d9 100644
--- a/src/ca/tcpSendWatchdog.cpp
+++ b/src/ca/tcpSendWatchdog.cpp
@@ -24,7 +24,7 @@ tcpSendWatchdog::tcpSendWatchdog
 
 tcpSendWatchdog::~tcpSendWatchdog ()
 {
-    this->timer.getQueue().destroyTimer ( this->timer );
+    this->timer.destroy ();
 }
 
 epicsTimerNotify::expireStatus tcpSendWatchdog::expire ( const epicsTime & currentTime )
diff --git a/src/cas/example/simple/exAsyncPV.cc b/src/cas/example/simple/exAsyncPV.cc
index 4c905082d..5a24249e9 100644
--- a/src/cas/example/simple/exAsyncPV.cc
+++ b/src/cas/example/simple/exAsyncPV.cc
@@ -68,7 +68,7 @@ exAsyncWriteIO::~exAsyncWriteIO()
 {
 	this->pv.removeIO();
     if ( this->pv.getCAS() ) {
-        this->pv.getCAS()->destroyTimer ( this->timer );
+        this->timer.destroy ();
     }
 }
 
@@ -102,7 +102,7 @@ exAsyncReadIO::~exAsyncReadIO()
 {
 	this->pv.removeIO ();
     if ( this->pv.getCAS() ) {
-        this->pv.getCAS()->destroyTimer ( this->timer );
+        this->timer.destroy ();
     }
 }
 
diff --git a/src/cas/example/simple/exPV.cc b/src/cas/example/simple/exPV.cc
index 44a449937..968d19c86 100644
--- a/src/cas/example/simple/exPV.cc
+++ b/src/cas/example/simple/exPV.cc
@@ -49,7 +49,7 @@ exPV::exPV ( pvInfo &setup, bool preCreateFlag, bool scanOnIn ) :
 exPV::~exPV() 
 {
     if ( this->getCAS() ) {
-        this->getCAS()->destroyTimer ( this->timer );
+        this->timer.destroy ();
     }
     this->info.unlinkPV();
 }
diff --git a/src/cas/example/simple/exServer.cc b/src/cas/example/simple/exServer.cc
index ab94ad200..2a5e59639 100644
--- a/src/cas/example/simple/exServer.cc
+++ b/src/cas/example/simple/exServer.cc
@@ -329,7 +329,7 @@ exAsyncExistIO::exAsyncExistIO ( const pvInfo &pviIn, const casCtx &ctxIn,
 exAsyncExistIO::~exAsyncExistIO()
 {
     this->cas.removeIO ();
-    this->cas.destroyTimer ( this->timer );
+    this->timer.destroy ();
 }
 
 //
@@ -364,7 +364,7 @@ exAsyncCreateIO::exAsyncCreateIO ( pvInfo &pviIn, exServer &casIn,
 exAsyncCreateIO::~exAsyncCreateIO()
 {
     this->cas.removeIO ();
-    this->cas.destroyTimer ( this->timer );
+    this->timer.destroy ();
 }
 
 //
diff --git a/src/cas/generic/caServer.cc b/src/cas/generic/caServer.cc
index 2fdf50dfd..b50c6fee4 100644
--- a/src/cas/generic/caServer.cc
+++ b/src/cas/generic/caServer.cc
@@ -213,11 +213,6 @@ class epicsTimer & caServer::createTimer ()
     return fileDescriptorManager.createTimer ();
 }
 
-void caServer::destroyTimer ( class epicsTimer & tmr )
-{
-    fileDescriptorManager.destroyTimer ( tmr );
-}
-
 //
 // caServer::readEventsProcessedCounter
 //
diff --git a/src/cas/generic/casdef.h b/src/cas/generic/casdef.h
index e059d9f24..39c83f2eb 100644
--- a/src/cas/generic/casdef.h
+++ b/src/cas/generic/casdef.h
@@ -374,7 +374,6 @@ public:
 #endif
 
     epicsShareFunc class epicsTimer & createTimer ();
-    epicsShareFunc void destroyTimer ( class epicsTimer & );
 
 	//caStatus enableClients ();
 	//caStatus disableClients ();
diff --git a/src/cas/generic/st/caServerOS.cc b/src/cas/generic/st/caServerOS.cc
index f05229315..5414b24f4 100644
--- a/src/cas/generic/st/caServerOS.cc
+++ b/src/cas/generic/st/caServerOS.cc
@@ -34,7 +34,7 @@ casBeaconTimer::casBeaconTimer ( double delay, caServerOS &osIn ) :
 
 casBeaconTimer::~casBeaconTimer ()
 {
-    fileDescriptorManager.destroyTimer ( this->timer );
+    this->timer.destroy ();
 }
 
 //
diff --git a/src/cas/generic/st/casDGIntfOS.cc b/src/cas/generic/st/casDGIntfOS.cc
index de70af25c..41b0ed084 100644
--- a/src/cas/generic/st/casDGIntfOS.cc
+++ b/src/cas/generic/st/casDGIntfOS.cc
@@ -100,7 +100,7 @@ casDGEvWakeup::casDGEvWakeup () :
 //
 casDGEvWakeup::~casDGEvWakeup()
 {
-    fileDescriptorManager.destroyTimer ( this->timer );
+    this->timer.destroy ();
 }
 
 void casDGEvWakeup::start ( casDGIntfOS &os )
@@ -148,7 +148,7 @@ casDGIOWakeup::casDGIOWakeup () :
 //
 casDGIOWakeup::~casDGIOWakeup()
 {
-    fileDescriptorManager.destroyTimer ( this->timer );
+    this->timer.destroy ();
 }
 
 //
diff --git a/src/cas/generic/st/casStreamOS.cc b/src/cas/generic/st/casStreamOS.cc
index beee7eb4b..25638f192 100644
--- a/src/cas/generic/st/casStreamOS.cc
+++ b/src/cas/generic/st/casStreamOS.cc
@@ -117,7 +117,7 @@ casStreamEvWakeup::casStreamEvWakeup () :
 //
 casStreamEvWakeup::~casStreamEvWakeup()
 {
-    fileDescriptorManager.destroyTimer ( this->timer );
+    this->timer.destroy ();
 }
 
 //
@@ -185,7 +185,7 @@ casStreamIOWakeup::casStreamIOWakeup () :
 //
 casStreamIOWakeup::~casStreamIOWakeup()
 {
-    fileDescriptorManager.destroyTimer ( this->timer );
+    this->timer.deatroy ();
 }
 
 //
diff --git a/src/libCom/fdmgr/fdManager.h b/src/libCom/fdmgr/fdManager.h
index 5260aa387..72c93a0e0 100644
--- a/src/libCom/fdmgr/fdManager.h
+++ b/src/libCom/fdmgr/fdManager.h
@@ -103,7 +103,6 @@ public:
     epicsShareFunc class fdReg *lookUpFD (const SOCKET fd, const fdRegType type);
 
     epicsTimer & createTimer ();
-    void destroyTimer ( epicsTimer & );
 
 private:
     tsDLList<fdReg> regList;
@@ -212,10 +211,5 @@ inline epicsTimer & fdManager::createTimer ()
     return this->pTimerQueue->createTimer ();
 }
 
-inline void fdManager::destroyTimer ( epicsTimer & tmr ) 
-{
-    this->pTimerQueue->destroyTimer ( tmr );
-}
-
 #endif // fdManagerH_included
  
diff --git a/src/libCom/fdmgr/fdmgr.cpp b/src/libCom/fdmgr/fdmgr.cpp
index cdd8d7f26..c34c16e93 100644
--- a/src/libCom/fdmgr/fdmgr.cpp
+++ b/src/libCom/fdmgr/fdmgr.cpp
@@ -135,7 +135,7 @@ timerForOldFdmgr::timerForOldFdmgr ( oldFdmgr &fdmgrIn,
 timerForOldFdmgr::~timerForOldFdmgr ()
 {
     this->fdmgr.resTbl.remove ( this->getId() );
-    this->fdmgr.destroyTimer ( this->timer );
+    this->timer.destroy ();
 }
 
 epicsTimerNotify::expireStatus timerForOldFdmgr::expire ( const epicsTime & )
diff --git a/src/libCom/test/epicsTimerTest.cpp b/src/libCom/test/epicsTimerTest.cpp
index c7f2e71ef..5482781d5 100644
--- a/src/libCom/test/epicsTimerTest.cpp
+++ b/src/libCom/test/epicsTimerTest.cpp
@@ -68,7 +68,7 @@ delayVerify::delayVerify ( double expectedDelayIn, epicsTimerQueue &queueIn ) :
 
 delayVerify::~delayVerify ()
 {
-    this->timer.getQueue().destroyTimer ( this->timer );
+    this->timer.destroy ();
 }
 
 inline void delayVerify::setBegin ( const epicsTime &beginIn )
@@ -177,7 +177,7 @@ cancelVerify::cancelVerify ( epicsTimerQueue &queueIn ) :
 
 cancelVerify::~cancelVerify ()
 {
-    this->timer.getQueue().destroyTimer ( this->timer );
+    this->timer.destroy ();
 }
 
 inline void cancelVerify::start ( const epicsTime &expireTime )
@@ -271,7 +271,7 @@ periodicVerify::periodicVerify ( epicsTimerQueue & queueIn ) :
 
 periodicVerify::~periodicVerify ()
 {
-    this->timer.getQueue().destroyTimer ( this->timer );
+    this->timer.destroy ();
 }
 
 inline void periodicVerify::start ( const epicsTime &expireTime )
diff --git a/src/libCom/timer/epicsTimer.cpp b/src/libCom/timer/epicsTimer.cpp
index a9625654f..7aa053966 100644
--- a/src/libCom/timer/epicsTimer.cpp
+++ b/src/libCom/timer/epicsTimer.cpp
@@ -50,6 +50,8 @@ private:
 
 epicsTimer::~epicsTimer () {}
 
+epicsTimerQueueNotify::~epicsTimerQueueNotify () {}
+
 void epicsTimerNotify::show ( unsigned /* level */ ) const {}
 
 epicsTimerForC::epicsTimerForC ( timerQueue &queue, epicsTimerCallback pCBIn, void *pPrivateIn ) :
diff --git a/src/libCom/timer/epicsTimer.h b/src/libCom/timer/epicsTimer.h
index 91188451f..1eb668c40 100644
--- a/src/libCom/timer/epicsTimer.h
+++ b/src/libCom/timer/epicsTimer.h
@@ -46,7 +46,7 @@ public:
 
 class epicsTimer {
 public:
-    virtual ~epicsTimer () = 0; 
+    virtual void destroy () = 0; // requires existence of timer queue
     virtual void start ( epicsTimerNotify &, const epicsTime & ) = 0;
     virtual void start ( epicsTimerNotify &, double delaySeconds ) = 0;
     virtual void cancel () = 0;
@@ -58,23 +58,25 @@ public:
     virtual expireInfo getExpireInfo () const = 0;
     double getExpireDelay ();
     virtual void show ( unsigned int level ) const = 0;
-    virtual class epicsTimerQueue & getQueue () const = 0;
+protected:
+    virtual ~epicsTimer () = 0; // use destroy
 };
 
 class epicsTimerQueue {
 public:
-    virtual ~epicsTimerQueue () = 0;
     virtual epicsTimer & createTimer () = 0;
-    virtual void destroyTimer ( epicsTimer & ) = 0;
     virtual void show ( unsigned int level ) const = 0;
+protected:
+    virtual ~epicsTimerQueue () = 0;
 };
 
 class epicsTimerQueueActive : public epicsTimerQueue {
 public:
-    virtual ~epicsTimerQueueActive () = 0;
     static epicsShareFunc epicsTimerQueueActive & allocate (
         bool okToShare, int threadPriority = epicsThreadPriorityMin + 10 );
     virtual void release () = 0; 
+protected:
+    virtual ~epicsTimerQueueActive () = 0;
 };
 
 class epicsTimerQueueNotify {
@@ -82,6 +84,8 @@ public:
     // called when a new timer is inserted into the queue and the
     // delay to the next expire has changed
     virtual void reschedule () = 0;
+protected:
+    virtual ~epicsTimerQueueNotify () = 0;
 };
 
 class epicsTimerQueuePassive : public epicsTimerQueue {
diff --git a/src/libCom/timer/timer.cpp b/src/libCom/timer/timer.cpp
index 1e4d2ed3c..7e9d591f9 100644
--- a/src/libCom/timer/timer.cpp
+++ b/src/libCom/timer/timer.cpp
@@ -42,6 +42,13 @@ timer::~timer ()
     this->cancel ();
 }
 
+void timer::destroy () 
+{
+    epicsAutoMutex autoLock ( this->queue.mutex );
+    this->~timer ();
+    this->queue.timerFreeList.release ( this, sizeof( *this ) );
+}
+
 void timer::start ( epicsTimerNotify & notify, double delaySeconds )
 {
     this->start ( notify, epicsTime::getCurrent () + delaySeconds );
@@ -177,11 +184,6 @@ void timer::show ( unsigned int level ) const
     }
 }
 
-epicsTimerQueue & timer::getQueue () const
-{
-    return this->queue;
-}
-
 timerQueue & timer::getPrivTimerQueue()
 {
     return this->queue;
diff --git a/src/libCom/timer/timerPrivate.h b/src/libCom/timer/timerPrivate.h
index 26b8ac741..779c2364d 100644
--- a/src/libCom/timer/timerPrivate.h
+++ b/src/libCom/timer/timerPrivate.h
@@ -43,12 +43,12 @@
 
 class timer : public epicsTimer, public tsDLNode < timer > {
 public:
+    void destroy ();
     void start ( class epicsTimerNotify &, const epicsTime & );
     void start ( class epicsTimerNotify &, double delaySeconds );
     void cancel ();
     expireInfo getExpireInfo () const;
     void show ( unsigned int level ) const;
-    epicsTimerQueue & getQueue () const;
     class timerQueue & getPrivTimerQueue ();
 protected:
     timer ( class timerQueue & );
@@ -83,7 +83,6 @@ public:
     virtual ~timerQueue ();
     double process ( const epicsTime & currentTime );
     epicsTimer & createTimer ();
-    void destroyTimer ( epicsTimer & );
     void show ( unsigned int level ) const;
     epicsTimerForC & createTimerForC ( epicsTimerCallback, void *pPrivateIn );
     void destroyTimerForC ( epicsTimerForC & );
@@ -117,7 +116,6 @@ public:
     timerQueueActive ( bool okToShare, unsigned priority );
     ~timerQueueActive () = 0;
     epicsTimer & createTimer ();
-    void destroyTimer ( epicsTimer & );
     void show ( unsigned int level ) const;
     bool sharingOK () const;
     int threadPriority () const;
@@ -167,7 +165,6 @@ class timerQueuePassive : public epicsTimerQueuePassive {
 public:
     timerQueuePassive ( epicsTimerQueueNotify & );
     epicsTimer & createTimer ();
-    void destroyTimer ( epicsTimer & );
     void show ( unsigned int level ) const;
     double process ( const epicsTime & currentTime );
     epicsTimerForC & createTimerForC ( epicsTimerCallback, void *pPrivateIn );
diff --git a/src/libCom/timer/timerQueue.cpp b/src/libCom/timer/timerQueue.cpp
index 1fa10a5a2..85baae980 100644
--- a/src/libCom/timer/timerQueue.cpp
+++ b/src/libCom/timer/timerQueue.cpp
@@ -163,13 +163,6 @@ epicsTimer & timerQueue::createTimer ()
     return * new ( pBuf ) timer ( *this );
 }
 
-void timerQueue::destroyTimer ( epicsTimer & tmr ) 
-{
-    epicsAutoMutex autoLock ( this->mutex );
-    tmr.~epicsTimer ();
-    this->timerFreeList.release ( &tmr, sizeof( tmr ) );
-}
-
 void timerQueue::show ( unsigned level ) const
 {
     epicsAutoMutex locker ( this->mutex );
diff --git a/src/libCom/timer/timerQueueActive.cpp b/src/libCom/timer/timerQueueActive.cpp
index 4308caaba..d5d47cc11 100644
--- a/src/libCom/timer/timerQueueActive.cpp
+++ b/src/libCom/timer/timerQueueActive.cpp
@@ -76,12 +76,6 @@ epicsTimer & timerQueueActive::createTimer ()
     return this->queue.createTimer ();
 }
 
-void timerQueueActive::destroyTimer ( epicsTimer & et )
-{
-    timer & tmr = dynamic_cast < timer & > ( et );
-    this->queue.destroyTimer ( tmr );
-}
-
 epicsTimerForC & timerQueueActive::createTimerForC ( epicsTimerCallback pCB, void *pPrivateIn )
 {
     return this->queue.createTimerForC ( pCB, pPrivateIn );
diff --git a/src/libCom/timer/timerQueuePassive.cpp b/src/libCom/timer/timerQueuePassive.cpp
index 2b8ca8a7a..0101a366b 100644
--- a/src/libCom/timer/timerQueuePassive.cpp
+++ b/src/libCom/timer/timerQueuePassive.cpp
@@ -60,12 +60,6 @@ epicsTimer & timerQueuePassive::createTimer ()
     return this->queue.createTimer ();
 }
 
-void timerQueuePassive::destroyTimer ( epicsTimer & et )
-{
-    timer & tmr = dynamic_cast < timer & > ( et );
-    this->queue.destroyTimer ( tmr );
-}
-
 epicsTimerForC & timerQueuePassive::createTimerForC ( epicsTimerCallback pCB, void *pPrivateIn )
 {
     return this->queue.createTimerForC ( pCB, pPrivateIn );